68836931 has 2 divisors, whose sum is σ = 68836932. Its totient is φ = 68836930.

The previous prime is 68836913. The next prime is 68836951. The reversal of 68836931 is 13963886.

Together with previous prime (68836913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68836931 is a prime.

It is a super-2 number, since 2×68836931² = 9477046138997522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68836951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34418465 + 34418466.

It is an arithmetic number, because the mean of its divisors is an integer number (34418466).

Almost surely, 2^68836931 is an apocalyptic number.

68836931 is a deficient number, since it is larger than the sum of its proper divisors (1).

68836931 is an equidigital number, since it uses as much as digits as its factorization.

68836931 is an evil number, because the sum of its binary digits is even.

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

The square root of 68836931 is about 8296.8024563684. The cubic root of 68836931 is about 409.8332278301.

The spelling of 68836931 in words is "sixty-eight million, eight hundred thirty-six thousand, nine hundred thirty-one".