Number Gossip

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Unique Properties of 2357

  • 2357 is the smallest number whose square starts with 4 identical digits: 23572 = 5555449
  • 23:57 is the largest prime on a military (or 24-hour) clock
  • 2357 is the smallest four-digit number whose digits are distinct primes. It is also prime itself

Common Properties of 2357

Deficient
Evil
Odd
Prime
Square-free