Compare 127 vs 129
| Property | 127 | 129 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 1271 | 31 × 431 |
| Prime factorization | 127 | 3 × 43 |
| Divisors count | 2 | 4 |
| Divisors | 1, 127 | 1, 3, 43, 129 |
| Number of properties | 13 | 1 |
| Chen primes | 25th | |
| Class 1+ primes | 13th | |
| Cousin primes (1st member) | 12th | |
| Cuban primes 1 | 5th | |
| Double mersenne primes | 2nd | |
| Good primes | 13th | |
| Isolated primes | 12th | |
| Lucky primes | 10th | |
| Mersenne primes | 4th | |
| Pierpont primes of the 2nd kind | 13th | |
| Primes | 31st | |
| Semiprimes | 43rd | |
| Solinas primes | 22nd | |
| Super primes | 11th | |
| Roman numberals | CXXVII | CXXIX |
| Base 2 | 11111112 | 100000012 |
| Base 3 | 112013 | 112103 |
| Base 4 | 13334 | 20014 |
| Base 5 | 10025 | 10045 |
| Base 6 | 3316 | 3336 |
| Base 7 | 2417 | 2437 |
| Base 8 | 1778 | 2018 |
| Base 9 | 1519 | 1539 |
| Base 10 | 12710 | 12910 |
| Base 11 | 10611 | 10811 |
| Base 12 | a712 | a912 |
| Base 13 | 9a13 | 9c13 |
| Base 14 | 9114 | 9314 |
| Base 15 | 8715 | 8915 |
| Base 16 | 7f16 | 8116 |