Compare 161917 vs 161921
| Property | 161917 | 161921 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 71 × 231311 | 1619211 |
| Prime factorization | 7 × 23131 | 161921 |
| Divisors count | 4 | 2 |
| Divisors | 1, 7, 23131, 161917 | 1, 161921 |
| Number of properties | 1 | 5 |
| Chen primes | 6329th | |
| Harmonic primes | 5564th | |
| Primes | 14844th | |
| Pythagorean primes | 7400th | |
| Semiprimes | 36986th | |
| Twin primes (1st member) | 1821st | |
| Roman numberals | ||
| Base 2 | 1001111000011111012 | 1001111000100000012 |
| Base 3 | 220200022213 | 220200100023 |
| Base 4 | 2132013314 | 2132020014 |
| Base 5 | 201401325 | 201401415 |
| Base 6 | 32453416 | 32453456 |
| Base 7 | 12430307 | 12430347 |
| Base 8 | 4741758 | 4742018 |
| Base 9 | 2660879 | 2661029 |
| Base 10 | 16191710 | 16192110 |
| Base 11 | 10071811 | 10072111 |
| Base 12 | 7985112 | 7985512 |
| Base 13 | 5891213 | 5891613 |
| Base 14 | 4301714 | 4301b14 |
| Base 15 | 32e9715 | 32e9b15 |
| Base 16 | 2787d16 | 2788116 |