1729 (number)

$1729$ is the smallest number that can be expressed as the sum of two positive cubes in two ways.

It can be done by

$10^3+9^3=1729$

or

$1^3+12^3=1729.$

This is sometimes known as the Ramanujan number.

The number 1729 is between 1728 and 1730. It's factorization is 7×13×19. The factors are 1;7;13;19;91;133;247 and 1729. This number is an odd number and a "3 odd digits and a even" number