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 133
- 133 is the smallest number n such that sum of its digits of n equals the least prime dividing n and sum of squares of digits of n equals the greatest prime dividing n
- 133 is the smallest counterbalanced number, that is the smallest composite n for which the sum of the proper divisors of n divides φ(n)