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 99

  • 99 is the largest number that is equal to the sum of its digits plus the product of its digits: 99 = 9 + 9 + 9 * 9
  • 99 is the alphanumeric value of THIRTEEN
  • 99 is the smallest number for which the digital sum contains the same distinct digits as the digital product but the digital sum is not equal to the digital product

Common Properties of 99

Composite
Deficient
Evil
Lucky
Odd
Palindrome
Ulam