68368931 has 2 divisors, whose sum is σ = 68368932. Its totient is φ = 68368930.

The previous prime is 68368847. The next prime is 68368967. The reversal of 68368931 is 13986386.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68368931 - 2¹⁰ = 68367907 is a prime.

It is a super-2 number, since 2×68368931² = 9348621452165522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68365931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34184465 + 34184466.

It is an arithmetic number, because the mean of its divisors is an integer number (34184466).

Almost surely, 2^68368931 is an apocalyptic number.

68368931 is a deficient number, since it is larger than the sum of its proper divisors (1).

68368931 is an equidigital number, since it uses as much as digits as its factorization.

68368931 is an odious number, because the sum of its binary digits is odd.

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

The square root of 68368931 is about 8268.5507194429. The cubic root of 68368931 is about 408.9023405698.

The spelling of 68368931 in words is "sixty-eight million, three hundred sixty-eight thousand, nine hundred thirty-one".