Compare 640021 vs 640027
| Property | 640021 | 640027 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 231 × 278271 | 6400271 |
| Prime factorization | 23 × 27827 | 640027 |
| Divisors count | 4 | 2 |
| Divisors | 1, 23, 27827, 640021 | 1, 640027 |
| Number of properties | 1 | 3 |
| Additive primes | 20352nd | |
| Isolated primes | 40815th | |
| Primes | 52078th | |
| Semiprimes | 137148th | |
| Roman numberals | ||
| Base 2 | 100111000100000101012 | 100111000100000110112 |
| Base 3 | 10121112211113 | 10121112212013 |
| Base 4 | 21301001114 | 21301001234 |
| Base 5 | 1304400415 | 1304401025 |
| Base 6 | 214150216 | 214150316 |
| Base 7 | 53036447 | 53036537 |
| Base 8 | 23420258 | 23420338 |
| Base 9 | 11748449 | 11748519 |
| Base 10 | 64002110 | 64002710 |
| Base 11 | 3a794811 | 3a795311 |
| Base 12 | 26a47112 | 26a47712 |
| Base 13 | 19541513 | 19541b13 |
| Base 14 | 12935b14 | 12936314 |
| Base 15 | c998115 | c998715 |
| Base 16 | 9c41516 | 9c41b16 |