Compare 640247 vs 640421
| Property | 640247 | 640421 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6402471 | 6404211 |
| Prime factorization | 640247 | 640421 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640247 | 1, 640421 |
| Number of properties | 5 | 3 |
| Additive primes | 20362nd | 20365th |
| Chen primes | 20388th | |
| Isolated primes | 40838th | |
| Primes | 52097th | 52109th |
| Twin primes (1st member) | 5635th | |
| Ulam primes | 3818th | |
| Roman numberals | ||
| Base 2 | 100111000100111101112 | 100111000101101001012 |
| Base 3 | 10121120202123 | 10121121110223 |
| Base 4 | 21301033134 | 21301122114 |
| Base 5 | 1304414425 | 1304431415 |
| Base 6 | 214200356 | 214205256 |
| Base 7 | 53044167 | 53050557 |
| Base 8 | 23423678 | 23426458 |
| Base 9 | 11752259 | 11754389 |
| Base 10 | 64024710 | 64042110 |
| Base 11 | 3a803311 | 3a818111 |
| Base 12 | 26a61b12 | 26a74512 |
| Base 13 | 19555a13 | 19566213 |
| Base 14 | 12947d14 | 12956514 |
| Base 15 | c9a8215 | c9b4b15 |
| Base 16 | 9c4f716 | 9c5a516 |