Compare 639949 vs 640247
| Property | 639949 | 640247 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6399491 | 6402471 |
| Prime factorization | 639949 | 640247 |
| Divisors count | 2 | 2 |
| Divisors | 1, 639949 | 1, 640247 |
| Number of properties | 3 | 5 |
| Additive primes | 20362nd | |
| Chen primes | 20388th | |
| Isolated primes | 40810th | |
| Primes | 52071st | 52097th |
| Twin primes (1st member) | 5635th | |
| Ulam primes | 3816th | 3818th |
| Roman numberals | ||
| Base 2 | 100111000011110011012 | 100111000100111101112 |
| Base 3 | 10121112112113 | 10121120202123 |
| Base 4 | 21300330314 | 21301033134 |
| Base 5 | 1304342445 | 1304414425 |
| Base 6 | 214144216 | 214200356 |
| Base 7 | 53035127 | 53044167 |
| Base 8 | 23417158 | 23423678 |
| Base 9 | 11747549 | 11752259 |
| Base 10 | 63994910 | 64024710 |
| Base 11 | 3a789211 | 3a803311 |
| Base 12 | 26a41112 | 26a61b12 |
| Base 13 | 19538b13 | 19555a13 |
| Base 14 | 12930914 | 12947d14 |
| Base 15 | c993415 | c9a8215 |
| Base 16 | 9c3cd16 | 9c4f716 |