Compare 640913 vs 640919
| Property | 640913 | 640919 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 71 × 131 × 70431 | 6409191 |
| Prime factorization | 7 × 13 × 7043 | 640919 |
| Divisors count | 8 | 2 |
| Divisors | 1, 7, 13, 91, 7043, 49301, 91559, 640913 | 1, 640919 |
| Number of properties | 0 | 5 |
| Additive primes | 20378th | |
| Chen primes | 20405th | |
| Isolated primes | 40868th | |
| Primes | 52143rd | |
| Ulam primes | 3821st | |
| Roman numberals | ||
| Base 2 | 100111000111100100012 | 100111000111100101112 |
| Base 3 | 10121200111123 | 10121200112023 |
| Base 4 | 21301321014 | 21301321134 |
| Base 5 | 1310021235 | 1310021345 |
| Base 6 | 214231056 | 214231156 |
| Base 7 | 53063607 | 53063667 |
| Base 8 | 23436218 | 23436278 |
| Base 9 | 11761459 | 11761529 |
| Base 10 | 64091310 | 64091910 |
| Base 11 | 3a858911 | 3a859411 |
| Base 12 | 26aa9512 | 26aa9b12 |
| Base 13 | 19595013 | 19595613 |
| Base 14 | 1297d714 | 1297dd14 |
| Base 15 | c9d7815 | c9d7e15 |
| Base 16 | 9c79116 | 9c79716 |