Compare 639907 vs 640019
| Property | 639907 | 640019 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6399071 | 6400191 |
| Prime factorization | 639907 | 640019 |
| Divisors count | 2 | 2 |
| Divisors | 1, 639907 | 1, 640019 |
| Number of properties | 5 | 4 |
| Chen primes | 20379th | |
| Cousin primes (1st member) | 5630th | |
| Good primes | 1985th | |
| Isolated primes | 40806th | 40814th |
| Primes | 52067th | 52077th |
| Safe primes | 3016th | |
| Super primes | 5325th | |
| Roman numberals | ||
| Base 2 | 100111000011101000112 | 100111000100000100112 |
| Base 3 | 10121112100213 | 10121112211023 |
| Base 4 | 21300322034 | 21301001034 |
| Base 5 | 1304341125 | 1304400345 |
| Base 6 | 214143116 | 214150156 |
| Base 7 | 53034227 | 53036427 |
| Base 8 | 23416438 | 23420238 |
| Base 9 | 11747079 | 11748429 |
| Base 10 | 63990710 | 64001910 |
| Base 11 | 3a785411 | 3a794611 |
| Base 12 | 26a39712 | 26a46b12 |
| Base 13 | 19535813 | 19541313 |
| Base 14 | 1292b914 | 12935914 |
| Base 15 | c990715 | c997e15 |
| Base 16 | 9c3a316 | 9c41316 |