# 654781329

$t_title is "654781329"

$t_adjust_path is "/~caldwell/curios/"

$t_class is "composite"

$short is "654781329"

$nunber_id is "5518"

$t_meta['description'] is "One of many pages of prime number
curiosities and trivia. This page discusses 654781329
Come explore a new prime today!"

654781329 = 3^2 x 72753481 is the only integer with just two distinct prime factors, which is also "penholodigital" (using each nonzero digit once and only once) and whose reversal is a square: 923187456 = 2^8 x 3^4 x 211^2 = 30384^2. [Post]

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