Compare 1891 vs 1906
| Property | 1891 | 1906 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 311 × 611 | 21 × 9531 |
| Prime factorization | 31 × 61 | 2 × 953 |
| Divisors count | 4 | 4 |
| Divisors | 1, 31, 61, 1891 | 1, 2, 953, 1906 |
| Number of properties | 1 | 1 |
| Semiprimes | 542nd | 548th |
| Roman numberals | MDCCCXCI | MCMVI |
| Base 2 | 111011000112 | 111011100102 |
| Base 3 | 21210013 | 21211213 |
| Base 4 | 1312034 | 1313024 |
| Base 5 | 300315 | 301115 |
| Base 6 | 124316 | 124546 |
| Base 7 | 53417 | 53627 |
| Base 8 | 35438 | 35628 |
| Base 9 | 25319 | 25479 |
| Base 10 | 189110 | 190610 |
| Base 11 | 146a11 | 148311 |
| Base 12 | 111712 | 112a12 |
| Base 13 | b2613 | b3813 |
| Base 14 | 99114 | 9a214 |
| Base 15 | 86115 | 87115 |
| Base 16 | 76316 | 77216 |