Number Gossip

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Unique Properties of 1131

  • 1131 is the smallest number such that exactly 10 consecutive odd integers starting with it are composite
  • 1131 is the smallest number with at least 4 digits such that all its substrings of length 3 are primes with at lest 3 digits

Common Properties of 1131

Composite
Deficient
Evil
Odd
Square-free