Compare 639645 vs 639647
| Property | 639645 | 639647 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 51 × 426431 | 6396471 |
| Prime factorization | 3 × 5 × 42643 | 639647 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 5, 15, 42643, 127929, 213215, 639645 | 1, 639647 |
| Number of properties | 0 | 4 |
| Centered heptagonal primes | 87th | |
| Chen primes | 20362nd | |
| Isolated primes | 40794th | |
| Primes | 52049th | |
| Roman numberals | ||
| Base 2 | 100111000010100111012 | 100111000010100111112 |
| Base 3 | 10121111021203 | 10121111021223 |
| Base 4 | 21300221314 | 21300221334 |
| Base 5 | 1304320405 | 1304320425 |
| Base 6 | 214131536 | 214131556 |
| Base 7 | 53025667 | 53026017 |
| Base 8 | 23412358 | 23412378 |
| Base 9 | 11743769 | 11743789 |
| Base 10 | 63964510 | 63964710 |
| Base 11 | 3a763611 | 3a763811 |
| Base 12 | 26a1b912 | 26a1bb12 |
| Base 13 | 1951b613 | 1951b813 |
| Base 14 | 12916d14 | 12917114 |
| Base 15 | c97d015 | c97d215 |
| Base 16 | 9c29d16 | 9c29f16 |