Compare 640121 vs 640663
| Property | 640121 | 640663 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6401211 | 6406631 |
| Prime factorization | 640121 | 640663 |
| Divisors count | 2 | 2 |
| Divisors | 1, 640121 | 1, 640663 |
| Number of properties | 4 | 6 |
| Chen primes | 20382nd | |
| Cousin primes (1st member) | 5636th | |
| Happy primes | 7419th | |
| Isolated primes | 40823rd | 40851st |
| Primes | 52086th | 52124th |
| Prime triplets (1st member) | 2063rd | |
| Sexy primes (1st member) | 11286th | 11293rd |
| Roman numberals | ||
| Base 2 | 100111000100011110012 | 100111000110100101112 |
| Base 3 | 10121120020123 | 10121122110213 |
| Base 4 | 21301013214 | 21301221134 |
| Base 5 | 1304404415 | 1310001235 |
| Base 6 | 214153056 | 214220116 |
| Base 7 | 53041467 | 53055527 |
| Base 8 | 23421718 | 23432278 |
| Base 9 | 11750659 | 11757379 |
| Base 10 | 64012110 | 64066310 |
| Base 11 | 3a7a2911 | 3a838111 |
| Base 12 | 26a53512 | 26a90712 |
| Base 13 | 19549113 | 1957ba13 |
| Base 14 | 1293cd14 | 12969914 |
| Base 15 | c99eb15 | c9c5d15 |
| Base 16 | 9c47916 | 9c69716 |