Compare 161991 vs 161999
| Property | 161991 | 161999 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 32 × 411 × 4391 | 1619991 |
| Prime factorization | 3 × 3 × 41 × 439 | 161999 |
| Divisors count | 12 | 2 |
| Divisors | 1, 3, 9, 41, 123, 369, 439, 1317, 3951, 17999, 53997, 161991 | 1, 161999 |
| Number of properties | 0 | 4 |
| Chen primes | 6332nd | |
| Harmonic primes | 5570th | |
| Isolated primes | 11209th | |
| Primes | 14852nd | |
| Roman numberals | ||
| Base 2 | 1001111000110001112 | 1001111000110011112 |
| Base 3 | 220200122003 | 220200122223 |
| Base 4 | 2132030134 | 2132030334 |
| Base 5 | 201404315 | 201404445 |
| Base 6 | 32455436 | 32455556 |
| Base 7 | 12431647 | 12432057 |
| Base 8 | 4743078 | 4743178 |
| Base 9 | 2661809 | 2661889 |
| Base 10 | 16199110 | 16199910 |
| Base 11 | 10078511 | 10079211 |
| Base 12 | 798b312 | 798bb12 |
| Base 13 | 5896b13 | 5897613 |
| Base 14 | 4306b14 | 4307514 |
| Base 15 | 32ee615 | 32eee15 |
| Base 16 | 278c716 | 278cf16 |