Wednesday, November 4, 2009


713 = 23 x 31.

713 is a brilliant number because it is a semiprime (product of two primes) whose prime factors have the same number of decimal digits.

713 is the sum of three consecutive prime numbers: 713 = 233 + 239 + 241.

713 is the number of commutative monoids of order 7 with four idempotents. A monoid is a set that is closed under an associative binary operation and has an identity element. Unlike a group, its elements need not have inverses.

Telephone area code 713 serves the Houston area.

Source: What’s Special About This Number?

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