Compare 1381 vs 1549
| Property | 1381 | 1549 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 13811 | 15491 |
| Prime factorization | 1381 | 1549 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1381 | 1, 1549 |
| Number of properties | 7 | 7 |
| Additive primes | 122nd | 133rd |
| Chen primes | 144th | |
| Cousin primes (1st member) | 54th | |
| Emirps | 64th | |
| Isolated primes | 130th | 145th |
| Long primes | 86th | 93rd |
| Primes | 221st | 244th |
| Pythagorean primes | 109th | 117th |
| Sexy primes (2nd member) | 106th | |
| Roman numberals | MCCCLXXXI | MDXLIX |
| Base 2 | 101011001012 | 110000011012 |
| Base 3 | 12200113 | 20101013 |
| Base 4 | 1112114 | 1200314 |
| Base 5 | 210115 | 221445 |
| Base 6 | 102216 | 111016 |
| Base 7 | 40127 | 43427 |
| Base 8 | 25458 | 30158 |
| Base 9 | 18049 | 21119 |
| Base 10 | 138110 | 154910 |
| Base 11 | 104611 | 118911 |
| Base 12 | 97112 | a9112 |
| Base 13 | 82313 | 92213 |
| Base 14 | 70914 | 7c914 |
| Base 15 | 62115 | 6d415 |
| Base 16 | 56516 | 60d16 |