Compare 639949 vs 639957
| Property | 639949 | 639957 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6399491 | 31 × 2133191 |
| Prime factorization | 639949 | 3 × 213319 |
| Divisors count | 2 | 4 |
| Divisors | 1, 639949 | 1, 3, 213319, 639957 |
| Number of properties | 3 | 1 |
| Isolated primes | 40810th | |
| Primes | 52071st | |
| Semiprimes | 137136th | |
| Ulam primes | 3816th | |
| Roman numberals | ||
| Base 2 | 100111000011110011012 | 100111000011110101012 |
| Base 3 | 10121112112113 | 10121112120103 |
| Base 4 | 21300330314 | 21300331114 |
| Base 5 | 1304342445 | 1304343125 |
| Base 6 | 214144216 | 214144336 |
| Base 7 | 53035127 | 53035237 |
| Base 8 | 23417158 | 23417258 |
| Base 9 | 11747549 | 11747639 |
| Base 10 | 63994910 | 63995710 |
| Base 11 | 3a789211 | 3a789a11 |
| Base 12 | 26a41112 | 26a41912 |
| Base 13 | 19538b13 | 19539613 |
| Base 14 | 12930914 | 12931314 |
| Base 15 | c993415 | c993c15 |
| Base 16 | 9c3cd16 | 9c3d516 |