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
- Binary
- 1101101101111
- Octal
- 15557
- Hexadecimal
- 1b6f
- Scientific notation
- 7.023 × 10^3
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: 3 August 2026