Compare 640421 vs 640531
| Property | 640421 | 640531 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6404211 | 6405311 |
| Prime factorization | 640421 | 640531 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640421 | 1, 640531 |
| Number of properties | 3 | 3 |
| Additive primes | 20365th | 20367th |
| Isolated primes | 40838th | |
| Primes | 52109th | 52116th |
| Twin primes (2nd member) | 5637th | |
| Roman numberals | ||
| Base 2 | 100111000101101001012 | 100111000110000100112 |
| Base 3 | 10121121110223 | 10121121221013 |
| Base 4 | 21301122114 | 21301201034 |
| Base 5 | 1304431415 | 1304441115 |
| Base 6 | 214205256 | 214212316 |
| Base 7 | 53050557 | 53053037 |
| Base 8 | 23426458 | 23430238 |
| Base 9 | 11754389 | 11755719 |
| Base 10 | 64042110 | 64053110 |
| Base 11 | 3a818111 | 3a827111 |
| Base 12 | 26a74512 | 26a81712 |
| Base 13 | 19566213 | 19571813 |
| Base 14 | 12956514 | 12960314 |
| Base 15 | c9b4b15 | c9bc115 |
| Base 16 | 9c5a516 | 9c61316 |