Compare 639983 vs 639987
| Property | 639983 | 639987 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6399831 | 31 × 2133291 |
| Prime factorization | 639983 | 3 × 213329 |
| Divisors count | 2 | 4 |
| Divisors | 1, 639983 | 1, 3, 213329, 639987 |
| Number of properties | 4 | 1 |
| Chen primes | 20376th | |
| Happy primes | 7412th | |
| Isolated primes | 40812th | |
| Primes | 52073rd | |
| Semiprimes | 137145th | |
| Roman numberals | ||
| Base 2 | 100111000011111011112 | 100111000011111100112 |
| Base 3 | 10121112200023 | 10121112200203 |
| Base 4 | 21300332334 | 21300333034 |
| Base 5 | 1304344135 | 1304344225 |
| Base 6 | 214145156 | 214145236 |
| Base 7 | 53035617 | 53035657 |
| Base 8 | 23417578 | 23417638 |
| Base 9 | 11748029 | 11748069 |
| Base 10 | 63998310 | 63998710 |
| Base 11 | 3a791311 | 3a791711 |
| Base 12 | 26a43b12 | 26a44312 |
| Base 13 | 1953b613 | 1953ba13 |
| Base 14 | 12933114 | 12933514 |
| Base 15 | c995815 | c995c15 |
| Base 16 | 9c3ef16 | 9c3f316 |