7023
NGC 7023 is the Iris Nebula.
- Odd
- Composite
Where 7023 fits
Why 7023 is special
It is a reflection nebula, so its colour is dust scattering starlight rather than gas emitting it, which is why it is blue rather than red.
Factors & digit properties
- Divisors (4)
- 1, 3, 2341, 7023
- Prime factorisation
- 3 × 2341
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 7023
- Scientific notation
- 7.023 × 10^3
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 1 0 1 1 0 1 1 0 1 1 1 1
1 × 4,096 + 1 × 2,048 + 0 × 1,024 + 1 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 1 × 2 + 1 × 1 = 7,023
Octal
1 5 5 5 7
1 × 4,096 + 5 × 512 + 5 × 64 + 5 × 8 + 7 × 1 = 7,023
Hexadecimal
1 b 6 f
1 × 4,096 + b × 256 + 6 × 16 + f × 1 = 7,023
Read as powers of two: 4,096 + 2,048 + 512 + 256 + 64 + 32 + 8 + 4 + 2 + 1 = 7,023.
In historical numeral systems
Egyptian
7 lotuses, 2 hobbles, 3 strokes
7 × 1,000 + 2 × 10 + 3 × 1 = 7,023. 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
- Semiprime
Related numbers & connections
A reflection nebula is blue because dust scatters short wavelengths; an emission nebula is red because gas emits.
View 1976 →Science
NGC 7023 is a reflection nebula illuminated by a nearby star. Its blue colour arises from preferential scattering of short wavelengths by dust, in contrast to the red of emission nebulae.
DocumentedSciencePeriod: 1794–
Common questions
Is 7023 a prime number?
No, 7023 is not prime.
What are the factors of 7023?
The factors of 7023 are 1, 3, 2341, 7023.
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