Compare 639851 vs 640663
| Property | 639851 | 640663 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6398511 | 6406631 |
| Prime factorization | 639851 | 640663 |
| Divisors count | 2 | 2 |
| Divisors | 1, 639851 | 1, 640663 |
| Number of properties | 6 | 6 |
| Chen primes | 20371st | |
| Cousin primes (1st member) | 5636th | |
| Happy primes | 7419th | |
| Isolated primes | 40851st | |
| Primes | 52064th | 52124th |
| Prime triplets (1st member) | 2062nd | 2063rd |
| Sexy primes (1st member) | 11284th | 11293rd |
| Sophie germain primes | 5305th | |
| Twin primes (1st member) | 5631st | |
| Roman numberals | ||
| Base 2 | 100111000011011010112 | 100111000110100101112 |
| Base 3 | 10121112010123 | 10121122110213 |
| Base 4 | 21300312234 | 21301221134 |
| Base 5 | 1304334015 | 1310001235 |
| Base 6 | 214141356 | 214220116 |
| Base 7 | 53033127 | 53055527 |
| Base 8 | 23415538 | 23432278 |
| Base 9 | 11746359 | 11757379 |
| Base 10 | 63985110 | 64066310 |
| Base 11 | 3a780311 | 3a838111 |
| Base 12 | 26a34b12 | 26a90712 |
| Base 13 | 19531413 | 1957ba13 |
| Base 14 | 12927914 | 12969914 |
| Base 15 | c98bb15 | c9c5d15 |
| Base 16 | 9c36b16 | 9c69716 |