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 209

  • 209 the smallest composite which is 1 less than a primorial
  • 209 is the smallest multiple of 11 such that its digit sum is also a multiple of 11

Common Properties of 209

Composite
Deficient
Evil
Odd
Square-free
Ulam