Compare 639687 vs 639689
| Property | 639687 | 639689 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 2132291 | 6396891 |
| Prime factorization | 3 × 213229 | 639689 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 213229, 639687 | 1, 639689 |
| Number of properties | 1 | 4 |
| Additive primes | 20341st | |
| Chen primes | 20364th | |
| Isolated primes | 40796th | |
| Primes | 52053rd | |
| Semiprimes | 137075th | |
| Roman numberals | ||
| Base 2 | 100111000010110001112 | 100111000010110010012 |
| Base 3 | 10121111110103 | 10121111110123 |
| Base 4 | 21300230134 | 21300230214 |
| Base 5 | 1304322225 | 1304322245 |
| Base 6 | 214133036 | 214133056 |
| Base 7 | 53026567 | 53026617 |
| Base 8 | 23413078 | 23413118 |
| Base 9 | 11744339 | 11744359 |
| Base 10 | 63968710 | 63968910 |
| Base 11 | 3a767411 | 3a767611 |
| Base 12 | 26a23312 | 26a23512 |
| Base 13 | 19521913 | 19521b13 |
| Base 14 | 12919d14 | 1291a114 |
| Base 15 | c980c15 | c980e15 |
| Base 16 | 9c2c716 | 9c2c916 |