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 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.