68415931 has 2 divisors, whose sum is σ = 68415932. Its totient is φ = 68415930.

The previous prime is 68415899. The next prime is 68416013. The reversal of 68415931 is 13951486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68415931 - 2⁵ = 68415899 is a prime.

It is a super-2 number, since 2×68415931² = 9361479229193522, which contains 22 as substring.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (68415631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34207965 + 34207966.

It is an arithmetic number, because the mean of its divisors is an integer number (34207966).

Almost surely, 2^68415931 is an apocalyptic number.

68415931 is a deficient number, since it is larger than the sum of its proper divisors (1).

68415931 is an equidigital number, since it uses as much as digits as its factorization.

68415931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 37.

The square root of 68415931 is about 8271.3923253585. The cubic root of 68415931 is about 408.9960186364.

The spelling of 68415931 in words is "sixty-eight million, four hundred fifteen thousand, nine hundred thirty-one".