Compare 640139 vs 640147
| Property | 640139 | 640147 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6401391 | 2771 × 23111 |
| Prime factorization | 640139 | 277 × 2311 |
| Divisors count | 2 | 4 |
| Divisors | 1, 640139 | 1, 277, 2311, 640147 |
| Number of properties | 4 | 1 |
| Additive primes | 20356th | |
| Chen primes | 20383rd | |
| Isolated primes | 40825th | |
| Primes | 52088th | |
| Semiprimes | 137172nd | |
| Roman numberals | ||
| Base 2 | 100111000100100010112 | 100111000100100100112 |
| Base 3 | 10121120022123 | 10121120100113 |
| Base 4 | 21301020234 | 21301021034 |
| Base 5 | 1304410245 | 1304410425 |
| Base 6 | 214153356 | 214153516 |
| Base 7 | 53042037 | 53042147 |
| Base 8 | 23422138 | 23422238 |
| Base 9 | 11750859 | 11751049 |
| Base 10 | 64013910 | 64014710 |
| Base 11 | 3a7a4511 | 3a7a5211 |
| Base 12 | 26a54b12 | 26a55712 |
| Base 13 | 1954a613 | 1954b113 |
| Base 14 | 12940314 | 12940b14 |
| Base 15 | c9a0e15 | c9a1715 |
| Base 16 | 9c48b16 | 9c49316 |