Compare 640247 vs 640687
| Property | 640247 | 640687 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6402471 | 6406871 |
| Prime factorization | 640247 | 640687 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640247 | 1, 640687 |
| Number of properties | 5 | 5 |
| Additive primes | 20362nd | 20373rd |
| Chen primes | 20388th | |
| Cousin primes (1st member) | 5637th | |
| Isolated primes | 40852nd | |
| Primes | 52097th | 52127th |
| Super primes | 5330th | |
| Twin primes (1st member) | 5635th | |
| Ulam primes | 3818th | |
| Roman numberals | ||
| Base 2 | 100111000100111101112 | 100111000110101011112 |
| Base 3 | 10121120202123 | 10121122120113 |
| Base 4 | 21301033134 | 21301222334 |
| Base 5 | 1304414425 | 1310002225 |
| Base 6 | 214200356 | 214220516 |
| Base 7 | 53044167 | 53056157 |
| Base 8 | 23423678 | 23432578 |
| Base 9 | 11752259 | 11757649 |
| Base 10 | 64024710 | 64068710 |
| Base 11 | 3a803311 | 3a83a311 |
| Base 12 | 26a61b12 | 26a92712 |
| Base 13 | 19555a13 | 19580813 |
| Base 14 | 12947d14 | 1296b514 |
| Base 15 | c9a8215 | c9c7715 |
| Base 16 | 9c4f716 | 9c6af16 |