Compare 187 vs 199
| Property | 187 | 199 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 111 × 171 | 1991 |
| Prime factorization | 11 × 17 | 199 |
| Divisors count | 4 | 2 |
| Divisors | 1, 11, 17, 187 | 1, 199 |
| Number of properties | 1 | 10 |
| Additive primes | 27th | |
| Centered triangular primes | 4th | |
| Chen primes | 36th | |
| Emirps | 15th | |
| Lucas primes | 7th | |
| Primes | 46th | |
| Prime quadruplets (4th member) | 4th | |
| Prime triplets (3rd member) | 14th | |
| Semiprimes | 61st | |
| Sexy primes (2nd member) | 26th | |
| Twin primes (2nd member) | 15th | |
| Roman numberals | CLXXXVII | CXCIX |
| Base 2 | 101110112 | 110001112 |
| Base 3 | 202213 | 211013 |
| Base 4 | 23234 | 30134 |
| Base 5 | 12225 | 12445 |
| Base 6 | 5116 | 5316 |
| Base 7 | 3557 | 4037 |
| Base 8 | 2738 | 3078 |
| Base 9 | 2279 | 2419 |
| Base 10 | 18710 | 19910 |
| Base 11 | 16011 | 17111 |
| Base 12 | 13712 | 14712 |
| Base 13 | 11513 | 12413 |
| Base 14 | d514 | 10314 |
| Base 15 | c715 | d415 |
| Base 16 | bb16 | c716 |