Compare 640139 vs 640247
| Property | 640139 | 640247 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6401391 | 6402471 |
| Prime factorization | 640139 | 640247 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640139 | 1, 640247 |
| Number of properties | 4 | 5 |
| Additive primes | 20356th | 20362nd |
| Chen primes | 20383rd | 20388th |
| Isolated primes | 40825th | |
| Primes | 52088th | 52097th |
| Twin primes (1st member) | 5635th | |
| Ulam primes | 3818th | |
| Roman numberals | ||
| Base 2 | 100111000100100010112 | 100111000100111101112 |
| Base 3 | 10121120022123 | 10121120202123 |
| Base 4 | 21301020234 | 21301033134 |
| Base 5 | 1304410245 | 1304414425 |
| Base 6 | 214153356 | 214200356 |
| Base 7 | 53042037 | 53044167 |
| Base 8 | 23422138 | 23423678 |
| Base 9 | 11750859 | 11752259 |
| Base 10 | 64013910 | 64024710 |
| Base 11 | 3a7a4511 | 3a803311 |
| Base 12 | 26a54b12 | 26a61b12 |
| Base 13 | 1954a613 | 19555a13 |
| Base 14 | 12940314 | 12947d14 |
| Base 15 | c9a0e15 | c9a8215 |
| Base 16 | 9c48b16 | 9c4f716 |