Compare 21397 vs 21403
| Property | 21397 | 21403 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 213971 | 171 × 12591 |
| Prime factorization | 21397 | 17 × 1259 |
| Divisors count | 2 | 4 |
| Divisors | 1, 21397 | 1, 17, 1259, 21403 |
| Number of properties | 5 | 1 |
| Cousin primes (1st member) | 365th | |
| Isolated primes | 1677th | |
| Primes | 2402nd | |
| Pythagorean primes | 1191st | |
| Semiprimes | 5421st | |
| Sexy primes (2nd member) | 729th | |
| Roman numberals | ||
| Base 2 | 1010011100101012 | 1010011100110112 |
| Base 3 | 10021001113 | 10021002013 |
| Base 4 | 110321114 | 110321234 |
| Base 5 | 11410425 | 11411035 |
| Base 6 | 2430216 | 2430316 |
| Base 7 | 1162457 | 1162547 |
| Base 8 | 516258 | 516338 |
| Base 9 | 323149 | 323219 |
| Base 10 | 2139710 | 2140310 |
| Base 11 | 1509211 | 1509811 |
| Base 12 | 1047112 | 1047712 |
| Base 13 | 997c13 | 998513 |
| Base 14 | 7b2514 | 7b2b14 |
| Base 15 | 651715 | 651d15 |
| Base 16 | 539516 | 539b16 |