7293
NGC 7293 is the Helix Nebula.
- Odd
- Composite
Where 7293 fits
Why 7293 is special
It is among the closest planetary nebulae, which is why it appears large and faint rather than small and bright.
Factors & digit properties
- Divisors (16)
- 1, 3, 11, 13, 17, 33, 39, 51, 143, 187, 221, 429, 561, 663, 2431, 7293
- Prime factorisation
- 3 × 11 × 13 × 17
- Digit sum
- 21
- Digital root
- 3
Representations
- Decimal
- 7293
- Scientific notation
- 7.293 × 10^3
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 1 1 0 0 0 1 1 1 1 1 0 1
1 × 4,096 + 1 × 2,048 + 1 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 7,293
Octal
1 6 1 7 5
1 × 4,096 + 6 × 512 + 1 × 64 + 7 × 8 + 5 × 1 = 7,293
Hexadecimal
1 c 7 d
1 × 4,096 + c × 256 + 7 × 16 + d × 1 = 7,293
Read as powers of two: 4,096 + 2,048 + 1,024 + 64 + 32 + 16 + 8 + 4 + 1 = 7,293.
In historical numeral systems
Egyptian
7 lotuses, 2 coils of rope, 9 hobbles, 3 strokes
7 × 1,000 + 2 × 100 + 9 × 10 + 3 × 1 = 7,293. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
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
- Lucky number (mathematical sieve)
Related numbers & connections
The Dumbbell was the first planetary nebula ever found, and the Helix among the nearest.
View 6853 →Science
NGC 7293 lies roughly 650 light years away. Its proximity spreads its light across a large apparent area, giving low surface brightness despite its size.
DocumentedSciencePeriod: 1824–
Common questions
Is 7293 a prime number?
No, 7293 is not prime.
What are the factors of 7293?
The factors of 7293 are 1, 3, 11, 13, 17, 33, 39, 51, 143, 187, 221, 429, 561, 663, 2431, 7293.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026