The book is now available! 876
(another Prime Pages' Curiosity)
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876 = prime(8+7+6) * phi(8+7+6). Note that 876 is the smallest number with this property and there is only two number with this property. [Firoozbakht]

 

  Submitted: 2004-09-05 12:12:47;   Last Modified: 2008-01-30 11:28:00.



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