# Compare 9 vs 13

Property | 9 | 13 |
---|---|---|

Type | semiprime | prime |

Unique factors | 1 | 1 |

Total factors | 2 | 1 |

Prime factorization | 3^{2} | 13^{1} |

Prime factorization | 3 × 3 | 13 |

Divisors count | 3 | 2 |

Divisors | 1, 3, 9 | 1, 13 |

Number of properties | 1 | 32 |

Centered square primes | 2nd | |

Chen primes | 6th | |

Cousin primes (1st member) | 3rd | |

Cuban primes 2 | 1st | |

Emirps | 1st | |

Fibonacci primes | 4th | |

Happy primes | 2nd | |

Harmonic primes | 2nd | |

Left-truncatable primes | 5th | |

Lucky primes | 3rd | |

Multiplicative primes | 5th | |

Pierpont primes | 5th | |

Primes | 6th | |

Prime quadruplets (2nd member) | 2nd | |

Prime quadruplets (4th member) | 1st | |

Prime quintuplet 1s (3rd member) | 1st | |

Prime quintuplet 2s (2nd member) | 2nd | |

Prime quintuplet 2s (4th member) | 1st | |

Prime sextuplets (3rd member) | 1st | |

Prime triplets (1st member) | 4th | |

Prime triplets (2nd member) | 3rd | |

Prime triplets (3rd member) | 2nd | |

Proth primes | 3rd | |

Pythagorean primes | 2nd | |

Semiprimes | 3rd | |

Sexy primes (1st member) | 4th | |

Sexy primes (2nd member) | 2nd | |

Sexy prime triplets (2nd member) | 2nd | |

Solinas primes | 5th | |

Thabit primes of the 2nd kind | 2nd | |

Twin primes (2nd member) | 3rd | |

Ulam primes | 4th | |

Wilson primes | 2nd | |

Roman numberals | IX | XIII |

Base 2 | 1001_{2} | 1101_{2} |

Base 3 | 100_{3} | 111_{3} |

Base 4 | 21_{4} | 31_{4} |

Base 5 | 14_{5} | 23_{5} |

Base 6 | 13_{6} | 21_{6} |

Base 7 | 12_{7} | 16_{7} |

Base 8 | 11_{8} | 15_{8} |

Base 9 | 10_{9} | 14_{9} |

Base 10 | 9_{10} | 13_{10} |

Base 11 | 9_{11} | 12_{11} |

Base 12 | 9_{12} | 11_{12} |

Base 13 | 9_{13} | 10_{13} |

Base 14 | 9_{14} | d_{14} |

Base 15 | 9_{15} | d_{15} |

Base 16 | 9_{16} | d_{16} |