Compare 27991 vs 27997
| Property | 27991 | 27997 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 231 × 12171 | 279971 |
| Prime factorization | 23 × 1217 | 27997 |
| Divisors count | 4 | 2 |
| Divisors | 1, 23, 1217, 27991 | 1, 27997 |
| Number of properties | 1 | 5 |
| Cousin primes (1st member) | 447th | |
| Harmonic primes | 1140th | |
| Isolated primes | 2164th | |
| Primes | 3055th | |
| Pythagorean primes | 1522nd | |
| Semiprimes | 6980th | |
| Roman numberals | ||
| Base 2 | 1101101010101112 | 1101101010111012 |
| Base 3 | 11021012013 | 11021012213 |
| Base 4 | 123111134 | 123111314 |
| Base 5 | 13434315 | 13434425 |
| Base 6 | 3333316 | 3333416 |
| Base 7 | 1444157 | 1444247 |
| Base 8 | 665278 | 665358 |
| Base 9 | 423519 | 423579 |
| Base 10 | 2799110 | 2799710 |
| Base 11 | 1a03711 | 1a04211 |
| Base 12 | 1424712 | 1425112 |
| Base 13 | c98213 | c98813 |
| Base 14 | a2b514 | a2bb14 |
| Base 15 | 846115 | 846715 |
| Base 16 | 6d5716 | 6d5d16 |