69

69 is the natural number preceding 70 and succeeding 68.

Properties

 * 69 ' s prime factorization is 3*23.
 * The digital root of 69 is 6.
 * The square of 69 is 4,761.
 * The cube of 69 is 328509.
 * 69 is the only number whose square concatenated with its cube contains each digit once and only once