Compare 639985 vs 640021
| Property | 639985 | 640021 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 1279971 | 231 × 278271 |
| Prime factorization | 5 × 127997 | 23 × 27827 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 127997, 639985 | 1, 23, 27827, 640021 |
| Number of properties | 1 | 1 |
| Semiprimes | 137143rd | 137148th |
| Roman numberals | ||
| Base 2 | 100111000011111100012 | 100111000100000101012 |
| Base 3 | 10121112200113 | 10121112211113 |
| Base 4 | 21300333014 | 21301001114 |
| Base 5 | 1304344205 | 1304400415 |
| Base 6 | 214145216 | 214150216 |
| Base 7 | 53035637 | 53036447 |
| Base 8 | 23417618 | 23420258 |
| Base 9 | 11748049 | 11748449 |
| Base 10 | 63998510 | 64002110 |
| Base 11 | 3a791511 | 3a794811 |
| Base 12 | 26a44112 | 26a47112 |
| Base 13 | 1953b813 | 19541513 |
| Base 14 | 12933314 | 12935b14 |
| Base 15 | c995a15 | c998115 |
| Base 16 | 9c3f116 | 9c41516 |