Compare 639949 vs 640943
| Property | 639949 | 640943 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6399491 | 6409431 |
| Prime factorization | 639949 | 640943 |
| Divisors count | 2 | 2 |
| Divisors | 1, 639949 | 1, 640943 |
| Number of properties | 3 | 6 |
| Chen primes | 20406th | |
| Isolated primes | 40810th | 40870th |
| Primes | 52071st | 52145th |
| Safe primes | 3021st | |
| Sexy primes (1st member) | 11299th | |
| Ulam primes | 3816th | 3822nd |
| Roman numberals | ||
| Base 2 | 100111000011110011012 | 100111000111101011112 |
| Base 3 | 10121112112113 | 10121200121223 |
| Base 4 | 21300330314 | 21301322334 |
| Base 5 | 1304342445 | 1310022335 |
| Base 6 | 214144216 | 214231556 |
| Base 7 | 53035127 | 53064327 |
| Base 8 | 23417158 | 23436578 |
| Base 9 | 11747549 | 11761789 |
| Base 10 | 63994910 | 64094310 |
| Base 11 | 3a789211 | 3a860611 |
| Base 12 | 26a41112 | 26aabb12 |
| Base 13 | 19538b13 | 19597413 |
| Base 14 | 12930914 | 12981914 |
| Base 15 | c993415 | c9d9815 |
| Base 16 | 9c3cd16 | 9c7af16 |