Compare 640631 vs 640637
| Property | 640631 | 640637 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6406311 | 3371 × 19011 |
| Prime factorization | 640631 | 337 × 1901 |
| Divisors count | 2 | 4 |
| Divisors | 1, 640631 | 1, 337, 1901, 640637 |
| Number of properties | 3 | 1 |
| Isolated primes | 40849th | |
| Primes | 52122nd | |
| Semiprimes | 137279th | |
| Sophie germain primes | 5310th | |
| Roman numberals | ||
| Base 2 | 100111000110011101112 | 100111000110011111012 |
| Base 3 | 10121122100023 | 10121122100223 |
| Base 4 | 21301213134 | 21301213314 |
| Base 5 | 1310000115 | 1310000225 |
| Base 6 | 214215156 | 214215256 |
| Base 7 | 53055057 | 53055147 |
| Base 8 | 23431678 | 23431758 |
| Base 9 | 11757029 | 11757089 |
| Base 10 | 64063110 | 64063710 |
| Base 11 | 3a835211 | 3a835811 |
| Base 12 | 26a89b12 | 26a8a512 |
| Base 13 | 19579413 | 19579a13 |
| Base 14 | 12967514 | 12967b14 |
| Base 15 | c9c3b15 | c9c4215 |
| Base 16 | 9c67716 | 9c67d16 |