Number Gossip

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Unique Properties of 1729

  • 1729 is a Ramanujan number, also called a taxi-cab number, the smallest number representable in two ways as a sum of two cubes: 1729 = 13+123 = 93+103
  • 1729 is the smallest number that is a pseudoprime simultaneously to bases 2, 3 and 5
  • Web pages about 1729:

Rare Properties of 1729

Carmichael

Common Properties of 1729

Composite
Deficient
Odd
Odious
Square-free