Compare 640663 vs 640901
| Property | 640663 | 640901 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6406631 | 6409011 |
| Prime factorization | 640663 | 640901 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640663 | 1, 640901 |
| Number of properties | 6 | 5 |
| Chen primes | 20403rd | |
| Cousin primes (1st member) | 5636th | |
| Happy primes | 7419th | |
| Isolated primes | 40851st | 40866th |
| Primes | 52124th | 52141st |
| Prime triplets (1st member) | 2063rd | |
| Sexy primes (1st member) | 11293rd | 11298th |
| Sophie germain primes | 5313th | |
| Roman numberals | ||
| Base 2 | 100111000110100101112 | 100111000111100001012 |
| Base 3 | 10121122110213 | 10121200110023 |
| Base 4 | 21301221134 | 21301320114 |
| Base 5 | 1310001235 | 1310021015 |
| Base 6 | 214220116 | 214230456 |
| Base 7 | 53055527 | 53063427 |
| Base 8 | 23432278 | 23436058 |
| Base 9 | 11757379 | 11761329 |
| Base 10 | 64066310 | 64090110 |
| Base 11 | 3a838111 | 3a857811 |
| Base 12 | 26a90712 | 26aa8512 |
| Base 13 | 1957ba13 | 19594113 |
| Base 14 | 12969914 | 1297c914 |
| Base 15 | c9c5d15 | c9d6b15 |
| Base 16 | 9c69716 | 9c78516 |