Compare 640906 vs 640907
| Property | 640906 | 640907 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 71 × 457791 | 6409071 |
| Prime factorization | 2 × 7 × 45779 | 640907 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 7, 14, 45779, 91558, 320453, 640906 | 1, 640907 |
| Number of properties | 0 | 4 |
| Chen primes | 20404th | |
| Isolated primes | 40867th | |
| Primes | 52142nd | |
| Sexy primes (2nd member) | 11298th | |
| Roman numberals | ||
| Base 2 | 100111000111100010102 | 100111000111100010112 |
| Base 3 | 10121200110213 | 10121200110223 |
| Base 4 | 21301320224 | 21301320234 |
| Base 5 | 1310021115 | 1310021125 |
| Base 6 | 214230546 | 214230556 |
| Base 7 | 53063507 | 53063517 |
| Base 8 | 23436128 | 23436138 |
| Base 9 | 11761379 | 11761389 |
| Base 10 | 64090610 | 64090710 |
| Base 11 | 3a858211 | 3a858311 |
| Base 12 | 26aa8a12 | 26aa8b12 |
| Base 13 | 19594613 | 19594713 |
| Base 14 | 1297d014 | 1297d114 |
| Base 15 | c9d7115 | c9d7215 |
| Base 16 | 9c78a16 | 9c78b16 |