92
92 is the atomic number of uranium, the primary fuel for nuclear power and the element behind the first atomic bomb.
- Even
- Composite
Where 92 fits
Why 92 is special
92's element carries some of the heaviest historical weight of any number in this range: uranium's fissile isotope U-235 powered the Hiroshima bomb in 1945, and uranium still fuels nuclear power today.
92 connects to:
- 46 — has factor
Same number, different meanings
How 92 is understood across different contexts — never implying one meaning because of another.
- Mathematics
92's element carries some of the heaviest historical weight of any number in this range: uranium's fissile isotope U-235 powered the Hiroshima bomb in 1945, and uranium still fuels nuclear power today.
- Science
The atomic number of the heaviest element that occurs naturally in more than trace amounts is 92. Uranium. Neptunium and plutonium do occur in nature, but in vanishingly small quantities produced by neutron capture in uranium ore, which is why the common phrasing 'the last natural element' needs the qualifier.
- History
Uranium's fissile isotope U-235 was the fuel used in the atomic bomb dropped on Hiroshima in 1945, and uranium remains the primary fuel for nuclear power generation today.
- Technology & computing
The Sikorsky S-92 was designed to civil transport certification standards for offshore and head-of-state transport, with a run-dry gearbox requirement following earlier offshore accidents.
Factors & digit properties
- Divisors (6)
- 1, 2, 4, 23, 46, 92
- Prime factorisation
- 2^2 × 23
- Digit sum
- 11
- Digital root
- 2
Representations
- Decimal
- 92
- Scientific notation
- 9.200 × 10^1
Roman numerals
X C I I
XCII uses the subtractive pair XC: ten before a hundred — a hundred minus ten.
Binary
1 0 1 1 1 0 0
1 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 92
Octal
1 3 4
1 × 64 + 3 × 8 + 4 × 1 = 92
Hexadecimal
5 c
5 × 16 + c × 1 = 92
Read as powers of two: 64 + 16 + 8 + 4 = 92.
In historical numeral systems
Egyptian
9 hobbles, 2 strokes
9 × 10 + 2 × 1 = 92. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 vertical wedge (sixties place), 3 corner wedges + 2 vertical wedges (units place)
1 × 60 + 32 = 92. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
koppa, then beta, marked as a numeral
koppa-beta + keraia
koppa + beta written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
tsadi, then bet
tsadi-bet
tsadi (90) + bet (2) = 92, written in descending order.
Chinese numerals
jiǔ shí èr
jiǔ shí èr
九 before 十 multiplies it: 9 tens. 二 after it adds 2. The written form mirrors the arithmetic — "jiǔ shí èr". The financial (anti-fraud) form is 玖拾貳.
Maya
4 dots (upper, twenties place) over 2 bars + 2 dots (lower, units place)
4 × 20 + 12 = 92. Places stack vertically with the smallest at the bottom, so the upper group is worth twenty times the lower.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Deficient number
- Pentagonal number
Related numbers & connections
46 is a factor of 92 (46 × 2 = 92).
View 46 →Mathematically related
- has factor46
why?
Strength 0.50, confidence "high".
Science
The atomic number of the heaviest element that occurs naturally in more than trace amounts is 92. Uranium. Neptunium and plutonium do occur in nature, but in vanishingly small quantities produced by neutron capture in uranium ore, which is why the common phrasing 'the last natural element' needs the qualifier.
DocumentedScienceGeography: worldwide92 is the atomic number of uranium, the heaviest element found in any quantity in nature. Its fissile isotope uranium-235 is what makes both nuclear power and nuclear weapons possible.
DocumentedScience
History
Uranium's fissile isotope U-235 was the fuel used in the atomic bomb dropped on Hiroshima in 1945, and uranium remains the primary fuel for nuclear power generation today.
DocumentedHistoryPeriod: 1945
Technology & computing
The Sikorsky S-92 was designed to civil transport certification standards for offshore and head-of-state transport, with a run-dry gearbox requirement following earlier offshore accidents.
DocumentedTechnology & computingGeography: United StatesPeriod: 2004–
Mathematics
Eight queens can be placed on a chessboard without mutual attack in 92 ways, which collapse to 12 distinct arrangements once symmetry is accounted for. It is the canonical example for teaching backtracking.
DocumentedMathematics
Common questions
How many ways can eight queens be placed on a chessboard?
92, if you count rotations and reflections separately; 12 if you do not. The puzzle asks for eight queens with none attacking another, and it is the standard teaching example for backtracking — try a placement, and when it fails, undo it and try the next.
Is 92 a prime number?
No, 92 is not prime.
What are the factors of 92?
The factors of 92 are 1, 2, 4, 23, 46, 92.
What is 92 in Roman numerals?
92 in Roman numerals is XCII. XC is subtractive: ten before a hundred — a hundred minus ten. Written additively it would be LXXXXII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 5 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026