2903
NGC 2903 is a bright barred spiral Messier missed.
- Odd
- Prime
Where 2903 fits
Why 2903 is special
It is brighter than several objects in the Messier catalogue and was omitted from it, which shows the catalogue was a list of things not to mistake for comets rather than a survey.
2903 is part of
Factors & digit properties
- Divisors (2)
- 1, 2903
- Prime factorisation
- 2903
- Digit sum
- 14
- Digital root
- 5
Representations
- Decimal
- 2903
- Binary
- 101101010111
- Octal
- 5527
- Hexadecimal
- b57
- Roman numeral
- MMCMIII
- Scientific notation
- 2.903 × 10^3
Other mathematical patterns
- Deficient number
- Happy number
- Sophie Germain prime
- Safe prime
Related numbers & connections
NGC 2903 is brighter than several Messier objects and absent from that catalogue, which shows what the catalogue was for.
View 1300 →Other connections
- contrasts with1300
why?
Strength 0.50, confidence "high".
Science
NGC 2903 in Leo is a barred spiral of comparable brightness to catalogued Messier objects, absent from that catalogue because it was compiled to exclude comet look-alikes rather than systematically.
DocumentedSciencePeriod: 1784–
Common questions
Is 2903 a prime number?
Yes, 2903 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 2903?
The factors of 2903 are 1, 2903.
What is 2903 in Roman numerals?
2903 in Roman numerals is MMCMIII.
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