68168731 has 2 divisors, whose sum is σ = 68168732. Its totient is φ = 68168730.

The previous prime is 68168707. The next prime is 68168743. The reversal of 68168731 is 13786186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68168731 - 2⁵ = 68168699 is a prime.

It is a super-2 number, since 2×68168731² = 9293951772300722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68168701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34084365 + 34084366.

It is an arithmetic number, because the mean of its divisors is an integer number (34084366).

Almost surely, 2^68168731 is an apocalyptic number.

68168731 is a deficient number, since it is larger than the sum of its proper divisors (1).

68168731 is an equidigital number, since it uses as much as digits as its factorization.

68168731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 68168731 is about 8256.4357322031. The cubic root of 68168731 is about 408.5028302393.

The spelling of 68168731 in words is "sixty-eight million, one hundred sixty-eight thousand, seven hundred thirty-one".