Compare 81281 vs 81899
| Property | 81281 | 81899 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 812811 | 818991 |
| Prime factorization | 81281 | 81899 |
| Divisors count | 2 | 2 |
| Divisors | 1, 81281 | 1, 81899 |
| Number of properties | 7 | 6 |
| Centered decagonal primes | 61st | |
| Chen primes | 3597th | 3611th |
| Happy primes | 1240th | |
| Harmonic primes | 3002nd | |
| Long primes | 3038th | |
| Primes | 7953rd | 8007th |
| Pythagorean primes | 3963rd | |
| Safe primes | 573rd | |
| Sophie germain primes | 988th | |
| Twin primes (1st member) | 1025th | 1030th |
| Roman numberals | ||
| Base 2 | 100111101100000012 | 100111111111010112 |
| Base 3 | 110101111023 | 110111000223 |
| Base 4 | 1033120014 | 1033332234 |
| Base 5 | 101001115 | 101100445 |
| Base 6 | 14241456 | 14310556 |
| Base 7 | 4556547 | 4605267 |
| Base 8 | 2366018 | 2377538 |
| Base 9 | 1334429 | 1343089 |
| Base 10 | 8128110 | 8189910 |
| Base 11 | 5608211 | 5659411 |
| Base 12 | 3b05512 | 3b48b12 |
| Base 13 | 2acc513 | 2b37c13 |
| Base 14 | 2189b14 | 21bbd14 |
| Base 15 | 1913b15 | 193ee15 |
| Base 16 | 13d8116 | 13feb16 |