Compare 640898 vs 640901
| Property | 640898 | 640901 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 21 × 3204491 | 6409011 |
| Prime factorization | 2 × 320449 | 640901 |
| Divisors count | 4 | 2 |
| Divisors | 1, 2, 320449, 640898 | 1, 640901 |
| Number of properties | 1 | 5 |
| Chen primes | 20403rd | |
| Isolated primes | 40866th | |
| Primes | 52141st | |
| Semiprimes | 137331st | |
| Sexy primes (1st member) | 11298th | |
| Sophie germain primes | 5313th | |
| Roman numberals | ||
| Base 2 | 100111000111100000102 | 100111000111100001012 |
| Base 3 | 10121200102223 | 10121200110023 |
| Base 4 | 21301320024 | 21301320114 |
| Base 5 | 1310020435 | 1310021015 |
| Base 6 | 214230426 | 214230456 |
| Base 7 | 53063367 | 53063427 |
| Base 8 | 23436028 | 23436058 |
| Base 9 | 11761289 | 11761329 |
| Base 10 | 64089810 | 64090110 |
| Base 11 | 3a857511 | 3a857811 |
| Base 12 | 26aa8212 | 26aa8512 |
| Base 13 | 19593b13 | 19594113 |
| Base 14 | 1297c614 | 1297c914 |
| Base 15 | c9d6815 | c9d6b15 |
| Base 16 | 9c78216 | 9c78516 |