Compare 1991 vs 2002
| Property | 1991 | 2002 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 4 |
| Total factors | 2 | 4 |
| Prime factorization | 111 × 1811 | 21 × 71 × 111 × 131 |
| Prime factorization | 11 × 181 | 2 × 7 × 11 × 13 |
| Divisors count | 4 | 16 |
| Divisors | 1, 11, 181, 1991 | 1, 2, 7, 11, 13, 14, 22, 26, 77, 91, 143, 154, 182, 286, 1001, 2002 |
| Number of properties | 1 | 0 |
| Semiprimes | 576th | |
| Roman numberals | MCMXCI | MMII |
| Base 2 | 111110001112 | 111110100102 |
| Base 3 | 22012023 | 22020113 |
| Base 4 | 1330134 | 1331024 |
| Base 5 | 304315 | 310025 |
| Base 6 | 131156 | 131346 |
| Base 7 | 55437 | 55607 |
| Base 8 | 37078 | 37228 |
| Base 9 | 26529 | 26649 |
| Base 10 | 199110 | 200210 |
| Base 11 | 155011 | 156011 |
| Base 12 | 119b12 | 11aa12 |
| Base 13 | ba213 | bb013 |
| Base 14 | a2314 | a3014 |
| Base 15 | 8cb15 | 8d715 |
| Base 16 | 7c716 | 7d216 |