68908931 has 8 divisors (see below), whose sum is σ = 84811104. Its totient is φ = 54521280.

The previous prime is 68908907. The next prime is 68908949. The reversal of 68908931 is 13980986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68908931 - 2⁶ = 68908867 is a prime.

It is a super-2 number, since 2×68908931² = 9496881543125522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68908981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378530 + ... + 378711.

It is an arithmetic number, because the mean of its divisors is an integer number (10601388).

Almost surely, 2^68908931 is an apocalyptic number.

68908931 is a deficient number, since it is larger than the sum of its proper divisors (15902173).

68908931 is a wasteful number, since it uses less digits than its factorization.

68908931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757261.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 68908931 is about 8301.1403433504. The cubic root of 68908931 is about 409.9760664197.

The spelling of 68908931 in words is "sixty-eight million, nine hundred eight thousand, nine hundred thirty-one".