Compare 1977 vs 1991
| Property | 1977 | 1991 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 31 × 6591 | 111 × 1811 |
| Prime factorization | 3 × 659 | 11 × 181 |
| Divisors count | 4 | 4 |
| Divisors | 1, 3, 659, 1977 | 1, 11, 181, 1991 |
| Number of properties | 1 | 1 |
| Semiprimes | 571st | 576th |
| Roman numberals | MCMLXXVII | MCMXCI |
| Base 2 | 111101110012 | 111110001112 |
| Base 3 | 22010203 | 22012023 |
| Base 4 | 1323214 | 1330134 |
| Base 5 | 304025 | 304315 |
| Base 6 | 130536 | 131156 |
| Base 7 | 55237 | 55437 |
| Base 8 | 36718 | 37078 |
| Base 9 | 26369 | 26529 |
| Base 10 | 197710 | 199110 |
| Base 11 | 153811 | 155011 |
| Base 12 | 118912 | 119b12 |
| Base 13 | b9113 | ba213 |
| Base 14 | a1314 | a2314 |
| Base 15 | 8bc15 | 8cb15 |
| Base 16 | 7b916 | 7c716 |