Compare 639839 vs 640663
| Property | 639839 | 640663 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6398391 | 6406631 |
| Prime factorization | 639839 | 640663 |
| Divisors count | 2 | 2 |
| Divisors | 1, 639839 | 1, 640663 |
| Number of properties | 7 | 6 |
| Chen primes | 20370th | |
| Cousin primes (1st member) | 5636th | |
| Happy primes | 7410th | 7419th |
| Isolated primes | 40804th | 40851st |
| Primes | 52063rd | 52124th |
| Prime triplets (1st member) | 2063rd | |
| Safe primes | 3015th | |
| Sexy primes (1st member) | 11293rd | |
| Sexy primes (2nd member) | 11283rd | |
| Sophie germain primes | 5304th | |
| Roman numberals | ||
| Base 2 | 100111000011010111112 | 100111000110100101112 |
| Base 3 | 10121112002023 | 10121122110213 |
| Base 4 | 21300311334 | 21301221134 |
| Base 5 | 1304333245 | 1310001235 |
| Base 6 | 214141156 | 214220116 |
| Base 7 | 53032647 | 53055527 |
| Base 8 | 23415378 | 23432278 |
| Base 9 | 11746229 | 11757379 |
| Base 10 | 63983910 | 64066310 |
| Base 11 | 3a77a211 | 3a838111 |
| Base 12 | 26a33b12 | 26a90712 |
| Base 13 | 19530513 | 1957ba13 |
| Base 14 | 12926b14 | 12969914 |
| Base 15 | c98ae15 | c9c5d15 |
| Base 16 | 9c35f16 | 9c69716 |