93
93 is the atomic number of neptunium, the first transuranium element ever synthesised.
- Odd
- Composite
Where 93 fits
Why 93 is special
93's element opened an entirely new region of the periodic table in 1940 — every element heavier than uranium followed its lead.
Factors & digit properties
- Divisors (4)
- 1, 3, 31, 93
- Prime factorisation
- 3 × 31
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 93
- Binary
- 1011101
- Octal
- 135
- Hexadecimal
- 5d
- Roman numeral
- XCIII
- Scientific notation
- 9.300 × 10^1
Other mathematical patterns
- Deficient number
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
31 is a factor of 93 (31 × 3 = 93).
View 31 →Mathematically related
- has factor31
why?
Strength 0.50, confidence "high".
Science
93 is the atomic number of neptunium, the first transuranium (heavier-than-uranium) element ever synthesised.
DocumentedSciencePeriod: 1940
Mathematics
93 factors as 3 × 31, sitting directly between the prime 89 and the notable 100.
DocumentedMathematics
Common questions
Is 93 a prime number?
No, 93 is not prime.
What are the factors of 93?
The factors of 93 are 1, 3, 31, 93.
What is 93 in Roman numerals?
93 in Roman numerals is XCIII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026