Compare 640223 vs 640421
| Property | 640223 | 640421 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6402231 | 6404211 |
| Prime factorization | 640223 | 640421 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640223 | 1, 640421 |
| Number of properties | 5 | 3 |
| Additive primes | 20360th | 20365th |
| Cousin primes (2nd member) | 5633rd | |
| Isolated primes | 40829th | 40838th |
| Primes | 52094th | 52109th |
| Sexy primes (1st member) | 11287th | |
| Roman numberals | ||
| Base 2 | 100111000100110111112 | 100111000101101001012 |
| Base 3 | 10121120122223 | 10121121110223 |
| Base 4 | 21301031334 | 21301122114 |
| Base 5 | 1304413435 | 1304431415 |
| Base 6 | 214155556 | 214205256 |
| Base 7 | 53043537 | 53050557 |
| Base 8 | 23423378 | 23426458 |
| Base 9 | 11751889 | 11754389 |
| Base 10 | 64022310 | 64042110 |
| Base 11 | 3a801111 | 3a818111 |
| Base 12 | 26a5bb12 | 26a74512 |
| Base 13 | 19553c13 | 19566213 |
| Base 14 | 12946314 | 12956514 |
| Base 15 | c9a6815 | c9b4b15 |
| Base 16 | 9c4df16 | 9c5a516 |