Compare 281981 vs 281989
| Property | 281981 | 281989 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 71 × 402831 | 2819891 |
| Prime factorization | 7 × 40283 | 281989 |
| Divisors count | 4 | 2 |
| Divisors | 1, 7, 40283, 281981 | 1, 281989 |
| Number of properties | 1 | 6 |
| Additive primes | 9857th | |
| Chen primes | 10120th | |
| Cousin primes (1st member) | 2832nd | |
| Isolated primes | 18900th | |
| Primes | 24603rd | |
| Semiprimes | 62745th | |
| Ulam primes | 1752nd | |
| Roman numberals | ||
| Base 2 | 10001001101011111012 | 10001001101100001012 |
| Base 3 | 1120222102023 | 1120222110013 |
| Base 4 | 10103113314 | 10103120114 |
| Base 5 | 330104115 | 330104245 |
| Base 6 | 100132456 | 100133016 |
| Base 7 | 22530507 | 22530617 |
| Base 8 | 10465758 | 10466058 |
| Base 9 | 4687229 | 4687319 |
| Base 10 | 28198110 | 28198910 |
| Base 11 | 18294711 | 18295411 |
| Base 12 | 11722512 | 11723112 |
| Base 13 | 9b46b13 | 9b47613 |
| Base 14 | 74a9714 | 74aa114 |
| Base 15 | 5883b15 | 5884415 |
| Base 16 | 44d7d16 | 44d8516 |