Prime Curios!: 1729

1729
(another Prime Pages' Curiosity)

Curios:

Index
Keywords
Home
Glossary
Previous
Next
Random

Curios Search: Participate:

Mail Editor
Submit Curio
Prime Puzzio
Test Number

Single Curio View: (Seek other curios for this number)

The largest number which is divisible by its prime sum of digits (19) and reversal (91) happens to be Ramanujan's famous taxi-cab number (1729 = 12³ + 1³ = 10³ + 9³). It is the smallest number expressible as the sum of two positive cubes in two different ways.

Submitted: 1999-09-02 18:40:00; Last Modified: 2008-01-30 11:28:00.