68957931 has 8 divisors (see below), whose sum is σ = 105078784. Its totient is φ = 39404520.

The previous prime is 68957921. The next prime is 68957947. The reversal of 68957931 is 13975986.

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

It is not a de Polignac number, because 68957931 - 2¹⁵ = 68925163 is a prime.

It is a super-2 number, since 2×68957931² = 9510392495601522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68957921) 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, 1641835 + ... + 1641876.

It is an arithmetic number, because the mean of its divisors is an integer number (13134848).

Almost surely, 2^68957931 is an apocalyptic number.

68957931 is a deficient number, since it is larger than the sum of its proper divisors (36120853).

68957931 is a wasteful number, since it uses less digits than its factorization.

68957931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283721.

The product of its digits is 408240, while the sum is 48.

The square root of 68957931 is about 8304.0912205972. The cubic root of 68957931 is about 410.0732191266.

The spelling of 68957931 in words is "sixty-eight million, nine hundred fifty-seven thousand, nine hundred thirty-one".