Compare 198 vs 199
| Property | 198 | 199 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 21 × 32 × 111 | 1991 |
| Prime factorization | 2 × 3 × 3 × 11 | 199 |
| Divisors count | 12 | 2 |
| Divisors | 1, 2, 3, 6, 9, 11, 18, 22, 33, 66, 99, 198 | 1, 199 |
| Number of properties | 0 | 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 | |
| Sexy primes (2nd member) | 26th | |
| Twin primes (2nd member) | 15th | |
| Roman numberals | CXCVIII | CXCIX |
| Base 2 | 110001102 | 110001112 |
| Base 3 | 211003 | 211013 |
| Base 4 | 30124 | 30134 |
| Base 5 | 12435 | 12445 |
| Base 6 | 5306 | 5316 |
| Base 7 | 4027 | 4037 |
| Base 8 | 3068 | 3078 |
| Base 9 | 2409 | 2419 |
| Base 10 | 19810 | 19910 |
| Base 11 | 17011 | 17111 |
| Base 12 | 14612 | 14712 |
| Base 13 | 12313 | 12413 |
| Base 14 | 10214 | 10314 |
| Base 15 | d315 | d415 |
| Base 16 | c616 | c716 |