# Number Gossip

(Enter a number and I'll tell you everything you wanted to know about it but were afraid to ask.)

## Unique Properties of 361

- 361 is the number of cells in the go board
- 361 is the smallest number that is not a multiple of 9 whose digital sum coincides with the digital sum of its largest proper divisor (361 = 19*19, the digital sum of 361 and 19 is 10)
- 361 is the smallest square containing a one, such that it remains a positive square after removing all ones from it