Compare 81281 vs 81689
| Property | 81281 | 81689 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 812811 | 816891 |
| Prime factorization | 81281 | 81689 |
| Divisors count | 2 | 2 |
| Divisors | 1, 81281 | 1, 81689 |
| Number of properties | 7 | 4 |
| Centered decagonal primes | 61st | |
| Chen primes | 3597th | 3603rd |
| Harmonic primes | 3002nd | |
| Isolated primes | 5935th | |
| Primes | 7953rd | 7990th |
| Pythagorean primes | 3963rd | 3981st |
| Sophie germain primes | 988th | |
| Twin primes (1st member) | 1025th | |
| Roman numberals | ||
| Base 2 | 100111101100000012 | 100111111000110012 |
| Base 3 | 110101111023 | 110110011123 |
| Base 4 | 1033120014 | 1033301214 |
| Base 5 | 101001115 | 101032245 |
| Base 6 | 14241456 | 14301056 |
| Base 7 | 4556547 | 4601067 |
| Base 8 | 2366018 | 2374318 |
| Base 9 | 1334429 | 1340459 |
| Base 10 | 8128110 | 8168910 |
| Base 11 | 5608211 | 5641311 |
| Base 12 | 3b05512 | 3b33512 |
| Base 13 | 2acc513 | 2b24a13 |
| Base 14 | 2189b14 | 21aad14 |
| Base 15 | 1913b15 | 1930e15 |
| Base 16 | 13d8116 | 13f1916 |