68665231 has 2 divisors, whose sum is σ = 68665232. Its totient is φ = 68665230.

The previous prime is 68665211. The next prime is 68665237. The reversal of 68665231 is 13256686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68665231 - 2⁹ = 68664719 is a prime.

It is a super-2 number, since 2×68665231² = 9429827896566722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68665237) 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 as a sum of consecutive naturals, namely, 34332615 + 34332616.

It is an arithmetic number, because the mean of its divisors is an integer number (34332616).

Almost surely, 2^68665231 is an apocalyptic number.

68665231 is a deficient number, since it is larger than the sum of its proper divisors (1).

68665231 is an equidigital number, since it uses as much as digits as its factorization.

68665231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 68665231 is about 8286.4486361770. The cubic root of 68665231 is about 409.4921950345.

The spelling of 68665231 in words is "sixty-eight million, six hundred sixty-five thousand, two hundred thirty-one".