Compare 638689 vs 638691
| Property | 638689 | 638691 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6386891 | 31 × 2128971 |
| Prime factorization | 638689 | 3 × 212897 |
| Divisors count | 2 | 4 |
| Divisors | 1, 638689 | 1, 3, 212897, 638691 |
| Number of properties | 3 | 1 |
| Chen primes | 20341st | |
| Isolated primes | 40740th | |
| Primes | 51985th | |
| Semiprimes | 136853rd | |
| Roman numberals | ||
| Base 2 | 100110111110111000012 | 100110111110111000112 |
| Base 3 | 10121100100113 | 10121100100203 |
| Base 4 | 21233232014 | 21233232034 |
| Base 5 | 1304142245 | 1304142315 |
| Base 6 | 214045216 | 214045236 |
| Base 7 | 53000327 | 53000347 |
| Base 8 | 23373418 | 23373438 |
| Base 9 | 11731049 | 11731069 |
| Base 10 | 63868910 | 63869110 |
| Base 11 | 3a694711 | 3a694911 |
| Base 12 | 26974112 | 26974312 |
| Base 13 | 19492c13 | 19493113 |
| Base 14 | 128a8914 | 128a8b14 |
| Base 15 | c939415 | c939615 |
| Base 16 | 9bee116 | 9bee316 |