68931863 has 16 divisors (see below), whose sum is σ = 92553216. Its totient is φ = 49580640.

The previous prime is 68931839. The next prime is 68931893. The reversal of 68931863 is 36813986.

It is a cyclic number.

It is not a de Polignac number, because 68931863 - 2⁶ = 68931799 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68931803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33431 + ... + 35432.

It is an arithmetic number, because the mean of its divisors is an integer number (5784576).

Almost surely, 2^68931863 is an apocalyptic number.

68931863 is a deficient number, since it is larger than the sum of its proper divisors (23621353).

68931863 is a wasteful number, since it uses less digits than its factorization.

68931863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68894.

The product of its digits is 186624, while the sum is 44.

The square root of 68931863 is about 8302.5214844648. The cubic root of 68931863 is about 410.0215396179.

The spelling of 68931863 in words is "sixty-eight million, nine hundred thirty-one thousand, eight hundred sixty-three".