Compare 640943 vs 642623
| Property | 640943 | 642623 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6409431 | 6426231 |
| Prime factorization | 640943 | 642623 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640943 | 1, 642623 |
| Number of properties | 6 | 5 |
| Additive primes | 20426th | |
| Chen primes | 20406th | |
| Isolated primes | 40870th | 40961st |
| Primes | 52145th | 52264th |
| Safe primes | 3021st | 3026th |
| Sexy primes (1st member) | 11299th | |
| Sophie germain primes | 5324th | |
| Ulam primes | 3822nd | |
| Roman numberals | ||
| Base 2 | 100111000111101011112 | 100111001110001111112 |
| Base 3 | 10121200121223 | 10121221112123 |
| Base 4 | 21301322334 | 21303203334 |
| Base 5 | 1310022335 | 1310304435 |
| Base 6 | 214231556 | 214350356 |
| Base 7 | 53064327 | 53143527 |
| Base 8 | 23436578 | 23470778 |
| Base 9 | 11761789 | 11784559 |
| Base 10 | 64094310 | 64262310 |
| Base 11 | 3a860611 | 3a98a311 |
| Base 12 | 26aabb12 | 26ba7b12 |
| Base 13 | 19597413 | 19666713 |
| Base 14 | 12981914 | 12a29914 |
| Base 15 | c9d9815 | ca61815 |
| Base 16 | 9c7af16 | 9ce3f16 |