68856831 has 8 divisors (see below), whose sum is σ = 102010160. Its totient is φ = 45904536.

The previous prime is 68856793. The next prime is 68856841. The reversal of 68856831 is 13865886.

68856831 is a `hidden beast` number, since 6 + 88 + 568 + 3 + 1 = 666.

It is not a de Polignac number, because 68856831 - 2¹⁰ = 68855807 is a prime.

It is a super-4 number, since 4×68856831⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68856841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275100 + ... + 1275153.

It is an arithmetic number, because the mean of its divisors is an integer number (12751270).

Almost surely, 2^68856831 is an apocalyptic number.

68856831 is a deficient number, since it is larger than the sum of its proper divisors (33153329).

68856831 is a wasteful number, since it uses less digits than its factorization.

68856831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550262 (or 2550256 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 68856831 is about 8298.0016268979. The cubic root of 68856831 is about 409.8727167853.

The spelling of 68856831 in words is "sixty-eight million, eight hundred fifty-six thousand, eight hundred thirty-one".