68289531 has 16 divisors (see below), whose sum is σ = 94164000. Its totient is φ = 43987968.

The previous prime is 68289511. The next prime is 68289541. The reversal of 68289531 is 13598286.

It is not a de Polignac number, because 68289531 - 2⁶ = 68289467 is a prime.

It is a super-2 number, since 2×68289531² = 9326920088399922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68289511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14475 + ... + 18603.

It is an arithmetic number, because the mean of its divisors is an integer number (5885250).

Almost surely, 2^68289531 is an apocalyptic number.

68289531 is a deficient number, since it is larger than the sum of its proper divisors (25874469).

68289531 is a wasteful number, since it uses less digits than its factorization.

68289531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4318.

The product of its digits is 103680, while the sum is 42.

The square root of 68289531 is about 8263.7479995460. The cubic root of 68289531 is about 408.7439868561.

The spelling of 68289531 in words is "sixty-eight million, two hundred eighty-nine thousand, five hundred thirty-one".