Compare 639985 vs 639987
| Property | 639985 | 639987 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 1279971 | 31 × 2133291 |
| Prime factorization | 5 × 127997 | 3 × 213329 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 127997, 639985 | 1, 3, 213329, 639987 |
| Number of properties | 1 | 1 |
| Semiprimes | 137143rd | 137145th |
| Roman numberals | ||
| Base 2 | 100111000011111100012 | 100111000011111100112 |
| Base 3 | 10121112200113 | 10121112200203 |
| Base 4 | 21300333014 | 21300333034 |
| Base 5 | 1304344205 | 1304344225 |
| Base 6 | 214145216 | 214145236 |
| Base 7 | 53035637 | 53035657 |
| Base 8 | 23417618 | 23417638 |
| Base 9 | 11748049 | 11748069 |
| Base 10 | 63998510 | 63998710 |
| Base 11 | 3a791511 | 3a791711 |
| Base 12 | 26a44112 | 26a44312 |
| Base 13 | 1953b813 | 1953ba13 |
| Base 14 | 12933314 | 12933514 |
| Base 15 | c995a15 | c995c15 |
| Base 16 | 9c3f116 | 9c3f316 |