Compare 639647 vs 639655
| Property | 639647 | 639655 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6396471 | 51 × 1279311 |
| Prime factorization | 639647 | 5 × 127931 |
| Divisors count | 2 | 4 |
| Divisors | 1, 639647 | 1, 5, 127931, 639655 |
| Number of properties | 4 | 1 |
| Centered heptagonal primes | 87th | |
| Chen primes | 20362nd | |
| Isolated primes | 40794th | |
| Primes | 52049th | |
| Semiprimes | 137068th | |
| Roman numberals | ||
| Base 2 | 100111000010100111112 | 100111000010101001112 |
| Base 3 | 10121111021223 | 10121111022213 |
| Base 4 | 21300221334 | 21300222134 |
| Base 5 | 1304320425 | 1304321105 |
| Base 6 | 214131556 | 214132116 |
| Base 7 | 53026017 | 53026127 |
| Base 8 | 23412378 | 23412478 |
| Base 9 | 11743789 | 11743879 |
| Base 10 | 63964710 | 63965510 |
| Base 11 | 3a763811 | 3a764511 |
| Base 12 | 26a1bb12 | 26a20712 |
| Base 13 | 1951b813 | 1951c313 |
| Base 14 | 12917114 | 12917914 |
| Base 15 | c97d215 | c97da15 |
| Base 16 | 9c29f16 | 9c2a716 |