Compare 639643 vs 639647
| Property | 639643 | 639647 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 891 × 71871 | 6396471 |
| Prime factorization | 89 × 7187 | 639647 |
| Divisors count | 4 | 2 |
| Divisors | 1, 89, 7187, 639643 | 1, 639647 |
| Number of properties | 1 | 4 |
| Centered heptagonal primes | 87th | |
| Chen primes | 20362nd | |
| Isolated primes | 40794th | |
| Primes | 52049th | |
| Semiprimes | 137065th | |
| Roman numberals | ||
| Base 2 | 100111000010100110112 | 100111000010100111112 |
| Base 3 | 10121111021113 | 10121111021223 |
| Base 4 | 21300221234 | 21300221334 |
| Base 5 | 1304320335 | 1304320425 |
| Base 6 | 214131516 | 214131556 |
| Base 7 | 53025647 | 53026017 |
| Base 8 | 23412338 | 23412378 |
| Base 9 | 11743749 | 11743789 |
| Base 10 | 63964310 | 63964710 |
| Base 11 | 3a763411 | 3a763811 |
| Base 12 | 26a1b712 | 26a1bb12 |
| Base 13 | 1951b413 | 1951b813 |
| Base 14 | 12916b14 | 12917114 |
| Base 15 | c97cd15 | c97d215 |
| Base 16 | 9c29b16 | 9c29f16 |