The folowing table expresses '7' in various number bases. 'DR_{x}' shows the result of 'digit reducing' resulting in an X-digit long number.

Base | DR_{3} | DR_{2} | DR_{1} |
---|---|---|---|

2 | 111 | 11,10 | 1 |

3 | 21,10 | 1 | |

4 | 13,10 | 1 | |

5 | 12 | 3 | |

6 | 11 | 2 | |

7 | 10 | 1 | |

8 | 7 | ||

9 | 7 | ||

10 | 7 | ||

11 | 7 | ||

12 | 7 | ||

13 | 7 | ||

14 | 7 | ||

15 | 7 | ||

16 | 7 |

Factors: Prime

7 is in the Pythagorean Triple: (7, 24, 25).

7 is the 2nd Mersenne number (*p*=3).

A 'Septagon' is a 'regular polygon' with 7 sides.

7 is the atomic weight of Nitrogen (N).

Uranus is the 7th planet in our solar system. See Planets.

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