Compare 640901 vs 640909
| Property | 640901 | 640909 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6409011 | 3471 × 18471 |
| Prime factorization | 640901 | 347 × 1847 |
| Divisors count | 2 | 4 |
| Divisors | 1, 640901 | 1, 347, 1847, 640909 |
| Number of properties | 5 | 1 |
| Chen primes | 20403rd | |
| Isolated primes | 40866th | |
| Primes | 52141st | |
| Semiprimes | 137333rd | |
| Sexy primes (1st member) | 11298th | |
| Sophie germain primes | 5313th | |
| Roman numberals | ||
| Base 2 | 100111000111100001012 | 100111000111100011012 |
| Base 3 | 10121200110023 | 10121200111013 |
| Base 4 | 21301320114 | 21301320314 |
| Base 5 | 1310021015 | 1310021145 |
| Base 6 | 214230456 | 214231016 |
| Base 7 | 53063427 | 53063537 |
| Base 8 | 23436058 | 23436158 |
| Base 9 | 11761329 | 11761419 |
| Base 10 | 64090110 | 64090910 |
| Base 11 | 3a857811 | 3a858511 |
| Base 12 | 26aa8512 | 26aa9112 |
| Base 13 | 19594113 | 19594913 |
| Base 14 | 1297c914 | 1297d314 |
| Base 15 | c9d6b15 | c9d7415 |
| Base 16 | 9c78516 | 9c78d16 |