# Compare 1663 vs 1999

Property | 1663 | 1999 |
---|---|---|

Type | prime | prime |

Unique factors | 1 | 1 |

Total factors | 1 | 1 |

Prime factorization | 1663^{1} | 1999^{1} |

Prime factorization | 1663 | 1999 |

Divisors count | 2 | 2 |

Divisors | 1, 1663 | 1, 1999 |

Number of properties | 11 | 8 |

Centered triangular primes | 10th | |

Cousin primes (1st member) | 59th | 65th |

Happy primes | 50th | |

Harmonic primes | 91st | |

Isolated primes | 158th | |

Long primes | 102nd | |

Lucky primes | 62nd | |

Primes | 261st | 303rd |

Prime triplets (1st member) | 43rd | |

Prime triplets (2nd member) | 50th | |

Prime triplets (3rd member) | 49th | |

Sexy primes (1st member) | 113th | |

Sexy primes (2nd member) | 112th | 128th |

Sexy prime triplets (2nd member) | 43rd | |

Sexy prime triplets (3rd member) | 50th | |

Twin primes (2nd member) | 61st | |

Roman numberals | MDCLXIII | MCMXCIX |

Base 2 | 11001111111_{2} | 11111001111_{2} |

Base 3 | 2021121_{3} | 2202001_{3} |

Base 4 | 121333_{4} | 133033_{4} |

Base 5 | 23123_{5} | 30444_{5} |

Base 6 | 11411_{6} | 13131_{6} |

Base 7 | 4564_{7} | 5554_{7} |

Base 8 | 3177_{8} | 3717_{8} |

Base 9 | 2247_{9} | 2661_{9} |

Base 10 | 1663_{10} | 1999_{10} |

Base 11 | 1282_{11} | 1558_{11} |

Base 12 | b67_{12} | 11a7_{12} |

Base 13 | 9ac_{13} | baa_{13} |

Base 14 | 86b_{14} | a2b_{14} |

Base 15 | 75d_{15} | 8d4_{15} |

Base 16 | 67f_{16} | 7cf_{16} |