Number Gossip

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Unique Properties of 139

  • 139 is the smallest prime which retains the end (unit) digit of its successor (149)
  • 139 is the smallest prime with one prime digit, one composite digit, and one digit that is neither prime nor composite
  • 139 is the largest prime factor among the smallest pair of odd amicable numbers

Common Properties of 139

Deficient
Evil
Happy
Odd
Prime
Square-free
Twin