Compare 643981 vs 643991
| Property | 643981 | 643991 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 131 × 495371 | 6439911 |
| Prime factorization | 13 × 49537 | 643991 |
| Divisors count | 4 | 2 |
| Divisors | 1, 13, 49537, 643981 | 1, 643991 |
| Number of properties | 1 | 3 |
| Isolated primes | 41043rd | |
| Primes | 52360th | |
| Semiprimes | 137975th | |
| Sophie germain primes | 5338th | |
| Roman numberals | ||
| Base 2 | 100111010011100011012 | 100111010011100101112 |
| Base 3 | 10122011010113 | 10122011011123 |
| Base 4 | 21310320314 | 21310321134 |
| Base 5 | 1311014115 | 1311014315 |
| Base 6 | 214452216 | 214452356 |
| Base 7 | 53213327 | 53213457 |
| Base 8 | 23516158 | 23516278 |
| Base 9 | 11813349 | 11813459 |
| Base 10 | 64398110 | 64399110 |
| Base 11 | 3aa91811 | 3aa92711 |
| Base 12 | 27081112 | 27081b12 |
| Base 13 | 19717013 | 19717a13 |
| Base 14 | 12a98914 | 12a99514 |
| Base 15 | cac2115 | cac2b15 |
| Base 16 | 9d38d16 | 9d39716 |