1097
NGC 1097 has a ring of star formation around its nucleus.
- Odd
- Prime
Where 1097 fits
Why 1097 is special
The ring sits where gas driven inward along the bar piles up and stalls, which makes it a direct picture of how a bar feeds a galaxy's centre.
Same number, different meanings
How 1097 is understood across different contexts — never implying one meaning because of another.
- Mathematics
The ring sits where gas driven inward along the bar piles up and stalls, which makes it a direct picture of how a bar feeds a galaxy's centre.
- History
In 1097, the crusader army took Nicaea and won at Dorylaeum, opening the road across Anatolia (Anatolia).
- Science
NGC 1097 is a barred spiral with a circumnuclear starburst ring roughly 5,000 light years across, formed where bar-driven gas inflow accumulates.
1097 is part of
Factors & digit properties
- Divisors (2)
- 1, 1097
- Prime factorisation
- 1097
- Digit sum
- 17
- Digital root
- 8
Representations
- Decimal
- 1097
- Scientific notation
- 1.097 × 10^3
Roman numerals
M X C V I I
MXCVII uses the subtractive pair XC: ten before a hundred — a hundred minus ten.
Binary
1 0 0 0 1 0 0 1 0 0 1
1 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 1,097
Octal
2 1 1 1
2 × 512 + 1 × 64 + 1 × 8 + 1 × 1 = 1,097
Hexadecimal
4 4 9
4 × 256 + 4 × 16 + 9 × 1 = 1,097
Read as powers of two: 1,024 + 64 + 8 + 1 = 1,097.
In historical numeral systems
Egyptian
1 lotus, 9 hobbles, 7 strokes
1 × 1,000 + 9 × 10 + 7 × 1 = 1,097. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 8 vertical wedges (sixties place), 1 corner wedge + 7 vertical wedges (units place)
18 × 60 + 17 = 1097. Places are separated by a space on the tablet, with the higher place written first.
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
Related numbers & connections
1097 is a year in the 11th century, in the 1090s.
Both show gas driven inward along a bar, one feeding an active nucleus and one piling up in a star-forming ring.
View 1365 →History
In 1097, the crusader army took Nicaea and won at Dorylaeum, opening the road across Anatolia (Anatolia).
DocumentedHistoryGeography: AnatoliaPeriod: 1097
Science
NGC 1097 is a barred spiral with a circumnuclear starburst ring roughly 5,000 light years across, formed where bar-driven gas inflow accumulates.
DocumentedSciencePeriod: 1790–
Common questions
Is 1097 a prime number?
Yes, 1097 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 1097?
The factors of 1097 are 1, 1097.
What is 1097 in Roman numerals?
1097 in Roman numerals is MXCVII. XC is subtractive: ten before a hundred — a hundred minus ten. Written additively it would be MLXXXXVII, 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: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026