Compare 640105 vs 640109
| Property | 640105 | 640109 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 1280211 | 6401091 |
| Prime factorization | 5 × 128021 | 640109 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 128021, 640105 | 1, 640109 |
| Number of properties | 1 | 3 |
| Chen primes | 20381st | |
| Isolated primes | 40822nd | |
| Primes | 52085th | |
| Semiprimes | 137164th | |
| Roman numberals | ||
| Base 2 | 100111000100011010012 | 100111000100011011012 |
| Base 3 | 10121120011213 | 10121120012023 |
| Base 4 | 21301012214 | 21301012314 |
| Base 5 | 1304404105 | 1304404145 |
| Base 6 | 214152416 | 214152456 |
| Base 7 | 53041247 | 53041317 |
| Base 8 | 23421518 | 23421558 |
| Base 9 | 11750479 | 11750529 |
| Base 10 | 64010510 | 64010910 |
| Base 11 | 3a7a1411 | 3a7a1811 |
| Base 12 | 26a52112 | 26a52512 |
| Base 13 | 19547b13 | 19548213 |
| Base 14 | 1293bb14 | 1293c114 |
| Base 15 | c99da15 | c99de15 |
| Base 16 | 9c46916 | 9c46d16 |