Compare 640259 vs 640271
| Property | 640259 | 640271 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6402591 | 171 × 376631 |
| Prime factorization | 640259 | 17 × 37663 |
| Divisors count | 2 | 4 |
| Divisors | 1, 640259 | 1, 17, 37663, 640271 |
| Number of properties | 4 | 1 |
| Chen primes | 20389th | |
| Primes | 52099th | |
| Semiprimes | 137197th | |
| Sophie germain primes | 5308th | |
| Twin primes (1st member) | 5636th | |
| Roman numberals | ||
| Base 2 | 100111000101000000112 | 100111000101000011112 |
| Base 3 | 10121120210223 | 10121120212023 |
| Base 4 | 21301100034 | 21301100334 |
| Base 5 | 1304420145 | 1304420415 |
| Base 6 | 214200556 | 214201156 |
| Base 7 | 53044347 | 53044527 |
| Base 8 | 23424038 | 23424178 |
| Base 9 | 11752389 | 11752529 |
| Base 10 | 64025910 | 64027110 |
| Base 11 | 3a804411 | 3a805511 |
| Base 12 | 26a62b12 | 26a63b12 |
| Base 13 | 19556913 | 19557813 |
| Base 14 | 12948b14 | 12949914 |
| Base 15 | c9a8e15 | c9a9b15 |
| Base 16 | 9c50316 | 9c50f16 |