68677931 has 16 divisors (see below), whose sum is σ = 82435584. Its totient is φ = 55940544.

The previous prime is 68677919. The next prime is 68677933. The reversal of 68677931 is 13977686.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68677931 is a prime.

It is a super-2 number, since 2×68677931² = 9433316412881522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68677933) 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, 24935 + ... + 27551.

It is an arithmetic number, because the mean of its divisors is an integer number (5152224).

Almost surely, 2^68677931 is an apocalyptic number.

68677931 is a deficient number, since it is larger than the sum of its proper divisors (13757653).

68677931 is a wasteful number, since it uses less digits than its factorization.

68677931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810.

The product of its digits is 381024, while the sum is 47.

The square root of 68677931 is about 8287.2149121403. The cubic root of 68677931 is about 409.5174393987.

The spelling of 68677931 in words is "sixty-eight million, six hundred seventy-seven thousand, nine hundred thirty-one".