Compare 177 vs 181
| Property | 177 | 181 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 31 × 591 | 1811 |
| Prime factorization | 3 × 59 | 181 |
| Divisors count | 4 | 2 |
| Divisors | 1, 3, 59, 177 | 1, 181 |
| Number of properties | 1 | 8 |
| Centered square primes | 6th | |
| Chen primes | 33rd | |
| Dihedral primes | 5th | |
| Long primes | 16th | |
| Palindromic primes | 9th | |
| Primes | 42nd | |
| Pythagorean primes | 19th | |
| Semiprimes | 57th | |
| Twin primes (2nd member) | 13th | |
| Roman numberals | CLXXVII | CLXXXI |
| Base 2 | 101100012 | 101101012 |
| Base 3 | 201203 | 202013 |
| Base 4 | 23014 | 23114 |
| Base 5 | 12025 | 12115 |
| Base 6 | 4536 | 5016 |
| Base 7 | 3427 | 3467 |
| Base 8 | 2618 | 2658 |
| Base 9 | 2169 | 2219 |
| Base 10 | 17710 | 18110 |
| Base 11 | 15111 | 15511 |
| Base 12 | 12912 | 13112 |
| Base 13 | 10813 | 10c13 |
| Base 14 | c914 | cd14 |
| Base 15 | bc15 | c115 |
| Base 16 | b116 | b516 |