Compare 1309 vs 1321
| Property | 1309 | 1321 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 71 × 111 × 171 | 13211 |
| Prime factorization | 7 × 11 × 17 | 1321 |
| Divisors count | 8 | 2 |
| Divisors | 1, 7, 11, 17, 77, 119, 187, 1309 | 1, 1321 |
| Number of properties | 0 | 7 |
| Additive primes | 118th | |
| Emirps | 63rd | |
| Harmonic primes | 74th | |
| Primes | 216th | |
| Pythagorean primes | 106th | |
| Sexy primes (1st member) | 94th | |
| Twin primes (2nd member) | 46th | |
| Roman numberals | MCCCIX | MCCCXXI |
| Base 2 | 101000111012 | 101001010012 |
| Base 3 | 12101113 | 12102213 |
| Base 4 | 1101314 | 1102214 |
| Base 5 | 202145 | 202415 |
| Base 6 | 100216 | 100416 |
| Base 7 | 35507 | 35657 |
| Base 8 | 24358 | 24518 |
| Base 9 | 17149 | 17279 |
| Base 10 | 130910 | 132110 |
| Base 11 | a9011 | aa111 |
| Base 12 | 91112 | 92112 |
| Base 13 | 79913 | 7a813 |
| Base 14 | 69714 | 6a514 |
| Base 15 | 5c415 | 5d115 |
| Base 16 | 51d16 | 52916 |