Compare 991977 vs 991981
| Property | 991977 | 991981 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 31 × 71 × 472371 | 9919811 |
| Prime factorization | 3 × 7 × 47237 | 991981 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 7, 21, 47237, 141711, 330659, 991977 | 1, 991981 |
| Number of properties | 0 | 6 |
| Additive primes | 29905th | |
| Chen primes | 29751st | |
| Emirps | 10998th | |
| Primes | 77925th | |
| Sexy primes (1st member) | 16280th | |
| Twin primes (2nd member) | 8113th | |
| Roman numberals | ||
| Base 2 | 111100100010111010012 | 111100100010111011012 |
| Base 3 | 12121012012203 | 12121012020013 |
| Base 4 | 33020232214 | 33020232314 |
| Base 5 | 2232204025 | 2232204115 |
| Base 6 | 331322536 | 331323016 |
| Base 7 | 113010307 | 113010347 |
| Base 8 | 36213518 | 36213558 |
| Base 9 | 17716569 | 17716619 |
| Base 10 | 99197710 | 99198110 |
| Base 11 | 61831811 | 61832111 |
| Base 12 | 3ba08912 | 3ba09112 |
| Base 13 | 28968c13 | 28969313 |
| Base 14 | 1bb71714 | 1bb71b14 |
| Base 15 | 148dbc15 | 148dc115 |
| Base 16 | f22e916 | f22ed16 |