Friday, August 28, 2009

867

867 = 3 x 172

867 is the number of graphs with 8 vertices that have chromatic number 5.

867 is a number n such that n times n + 7 gives the concatenation of two numbers m and m + 1: 867 x 874 = 757758.

867 is a number such that the sum of its digits is seven times the number of digits: 8 + 6 + 7 = 21 = 3 x 7.


"867-5309/Jenny" is a song written by Alex Call and Jim Keller and performed by Tommy Tutone. It peaked at number four on the Billboard Hot 100 chart and number one on the Billboard Top Tracks chart in 1982.

Source: What’s Special About This Number?

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