433
433 Eros was the first asteroid orbited and landed on by a spacecraft.
- Odd
- Prime
Where 433 fits
Why 433 is special
NEAR Shoemaker was not designed to land and was set down anyway at the end of its mission in 2001, transmitting from the surface for over two weeks afterwards.
433 is part of
Factors & digit properties
- Divisors (2)
- 1, 433
- Prime factorisation
- 433
- Digit sum
- 10
- Digital root
- 1
Representations
- Decimal
- 433
- Binary
- 110110001
- Octal
- 661
- Hexadecimal
- 1b1
- Roman numeral
- CDXXXIII
- Scientific notation
- 4.330 × 10^2
Other mathematical patterns
- Deficient number
- Lucky number (mathematical sieve)
- Twin prime
Related numbers & connections
Gaspra was the first asteroid photographed close up, six years before Eros became the first orbited and landed on.
View 951 →Science
NEAR Shoemaker orbited Eros for a year and was then deliberately brought down onto it in 2001, despite having no landing system. It kept transmitting from the surface for more than a fortnight.
DocumentedScience
Common questions
Is 433 a prime number?
Yes, 433 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 433?
The factors of 433 are 1, 433.
What is 433 in Roman numerals?
433 in Roman numerals is CDXXXIII.
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