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 9721

  • 9721 is the largest prime whose rearrangement of digits gives the famous Ramanujan number — 1729

Common Properties of 9721

Apocalyptic power
Deficient
Odd
Odious
Prime
Square-free
Twin
Ulam