Compare 1213 vs 1381
| Property | 1213 | 1381 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 12131 | 13811 |
| Prime factorization | 1213 | 1381 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1213 | 1, 1381 |
| Number of properties | 7 | 7 |
| Additive primes | 106th | 122nd |
| Chen primes | 144th | |
| Cousin primes (1st member) | 45th | |
| Emirps | 52nd | 64th |
| Good primes | 49th | |
| Isolated primes | 117th | 130th |
| Long primes | 86th | |
| Primes | 198th | 221st |
| Pythagorean primes | 97th | 109th |
| Roman numberals | MCCXIII | MCCCLXXXI |
| Base 2 | 100101111012 | 101011001012 |
| Base 3 | 11222213 | 12200113 |
| Base 4 | 1023314 | 1112114 |
| Base 5 | 143235 | 210115 |
| Base 6 | 53416 | 102216 |
| Base 7 | 33527 | 40127 |
| Base 8 | 22758 | 25458 |
| Base 9 | 15879 | 18049 |
| Base 10 | 121310 | 138110 |
| Base 11 | a0311 | 104611 |
| Base 12 | 85112 | 97112 |
| Base 13 | 72413 | 82313 |
| Base 14 | 62914 | 70914 |
| Base 15 | 55d15 | 62115 |
| Base 16 | 4bd16 | 56516 |