Compare 639851 vs 640457
| Property | 639851 | 640457 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6398511 | 6404571 |
| Prime factorization | 639851 | 640457 |
| Divisors count | 2 | 2 |
| Divisors | 1, 639851 | 1, 640457 |
| Number of properties | 6 | 4 |
| Chen primes | 20371st | 20391st |
| Isolated primes | 40839th | |
| Primes | 52064th | 52110th |
| Prime triplets (1st member) | 2062nd | |
| Sexy primes (1st member) | 11284th | 11290th |
| Sophie germain primes | 5305th | |
| Twin primes (1st member) | 5631st | |
| Roman numberals | ||
| Base 2 | 100111000011011010112 | 100111000101110010012 |
| Base 3 | 10121112010123 | 10121121121223 |
| Base 4 | 21300312234 | 21301130214 |
| Base 5 | 1304334015 | 1304433125 |
| Base 6 | 214141356 | 214210256 |
| Base 7 | 53033127 | 53051367 |
| Base 8 | 23415538 | 23427118 |
| Base 9 | 11746359 | 11754789 |
| Base 10 | 63985110 | 64045710 |
| Base 11 | 3a780311 | 3a820411 |
| Base 12 | 26a34b12 | 26a77512 |
| Base 13 | 19531413 | 19568c13 |
| Base 14 | 12927914 | 12958d14 |
| Base 15 | c98bb15 | c9b7215 |
| Base 16 | 9c36b16 | 9c5c916 |