Compare 1538 vs 1549
| Property | 1538 | 1549 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 21 × 7691 | 15491 |
| Prime factorization | 2 × 769 | 1549 |
| Divisors count | 4 | 2 |
| Divisors | 1, 2, 769, 1538 | 1, 1549 |
| Number of properties | 1 | 7 |
| Additive primes | 133rd | |
| Cousin primes (1st member) | 54th | |
| Isolated primes | 145th | |
| Long primes | 93rd | |
| Primes | 244th | |
| Pythagorean primes | 117th | |
| Semiprimes | 449th | |
| Sexy primes (2nd member) | 106th | |
| Roman numberals | MDXXXVIII | MDXLIX |
| Base 2 | 110000000102 | 110000011012 |
| Base 3 | 20022223 | 20101013 |
| Base 4 | 1200024 | 1200314 |
| Base 5 | 221235 | 221445 |
| Base 6 | 110426 | 111016 |
| Base 7 | 43257 | 43427 |
| Base 8 | 30028 | 30158 |
| Base 9 | 20889 | 21119 |
| Base 10 | 153810 | 154910 |
| Base 11 | 117911 | 118911 |
| Base 12 | a8212 | a9112 |
| Base 13 | 91413 | 92213 |
| Base 14 | 7bc14 | 7c914 |
| Base 15 | 6c815 | 6d415 |
| Base 16 | 60216 | 60d16 |