# 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 49

- 49 is the number of strings on a harp and the number of keys on a celesta
- 49 is the smallest number which is the concatenation of two prime squares creating another prime square
- 49 is the largest prime square which is greater than the product of all lesser primes
- 49 is the smallest number with the property that it and its neighbors are not squarefree
- 49 is the number of intersections of diagonals inside a regular octagon