**632**= 2

^{3}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: 6

^{2}+ 3

^{2}+ 2

^{2}= 49; 4

^{2}+ 9

^{2}= 97; 9

^{2}+ 7

^{2}= 130; 1

^{2}+ 3

^{2}+ 0

^{2}= 10; 1

^{2}+ 0

^{2}= 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