632

632 = 2³ x 79.

632 is a happy number. Take the sum of the squares of the digits of a number. Repeat the operation. If the result is eventually 1, the original number is happy: 6² + 3² + 2² = 49; 4² + 9² = 97; 9² + 7² = 130; 1² + 3² + 0² = 10; 1² + 0² = 1.

632 is the number of different necklaces (that can't be turned over) possible with 13 beads, each bead being one of 2 colors.

632 is a member of the following sequence: Start with 1 and repeatedly reverse the digits and add 7 to the next term: 1, 8, 15, 58, 92, 36, . . . 526, 632, 243., . . .


The prophet Muhammad, founder of Islam, died in the year 632.

Source: Number Gossip