68831913 has 16 divisors (see below), whose sum is σ = 93082496. Its totient is φ = 45239040.

The previous prime is 68831909. The next prime is 68831921. The reversal of 68831913 is 31913886.

It is not a de Polignac number, because 68831913 - 2² = 68831909 is a prime.

It is the 8297-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68831953) by changing a digit.

It is a nontrivial repunit in base 8296.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103803 + ... + 104463.

It is an arithmetic number, because the mean of its divisors is an integer number (5817656).

Almost surely, 2^68831913 is an apocalyptic number.

It is an amenable number.

68831913 is a deficient number, since it is larger than the sum of its proper divisors (24250583).

68831913 is a wasteful number, since it uses less digits than its factorization.

68831913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104.

The product of its digits is 31104, while the sum is 39.

The square root of 68831913 is about 8296.5000451998. The cubic root of 68831913 is about 409.8232690619.

The spelling of 68831913 in words is "sixty-eight million, eight hundred thirty-one thousand, nine hundred thirteen".