July 2009
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June 2009
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What's Special About This Number? →
Facts on every number from 0-9999, inclusive.
Example:
9747 is an Achilles number.
An Achilles number is a positive integer that is powerful (in the sense that each prime factor occurs with exponent greater than one) but imperfect (in the sense that the number is not a perfect power). The first few are 72, 108, 200, 288, 392, 432, … (Sloane’s A052486).
Achilles number =...
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St. Vincent - Laughing With A Mouth of Blood
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