Compare 639839 vs 640631
| Property | 639839 | 640631 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6398391 | 6406311 |
| Prime factorization | 639839 | 640631 |
| Divisors count | 2 | 2 |
| Divisors | 1, 639839 | 1, 640631 |
| Number of properties | 7 | 3 |
| Chen primes | 20370th | |
| Happy primes | 7410th | |
| Isolated primes | 40804th | 40849th |
| Primes | 52063rd | 52122nd |
| Safe primes | 3015th | |
| Sexy primes (2nd member) | 11283rd | |
| Sophie germain primes | 5304th | 5310th |
| Roman numberals | ||
| Base 2 | 100111000011010111112 | 100111000110011101112 |
| Base 3 | 10121112002023 | 10121122100023 |
| Base 4 | 21300311334 | 21301213134 |
| Base 5 | 1304333245 | 1310000115 |
| Base 6 | 214141156 | 214215156 |
| Base 7 | 53032647 | 53055057 |
| Base 8 | 23415378 | 23431678 |
| Base 9 | 11746229 | 11757029 |
| Base 10 | 63983910 | 64063110 |
| Base 11 | 3a77a211 | 3a835211 |
| Base 12 | 26a33b12 | 26a89b12 |
| Base 13 | 19530513 | 19579413 |
| Base 14 | 12926b14 | 12967514 |
| Base 15 | c98ae15 | c9c3b15 |
| Base 16 | 9c35f16 | 9c67716 |