68231957 has 2 divisors, whose sum is σ = 68231958. Its totient is φ = 68231956.

The previous prime is 68231951. The next prime is 68231987. The reversal of 68231957 is 75913286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56460196 + 11771761 = 7514^2 + 3431^2 .

It is a cyclic number.

It is not a de Polignac number, because 68231957 - 2¹⁶ = 68166421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68231951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34115978 + 34115979.

It is an arithmetic number, because the mean of its divisors is an integer number (34115979).

Almost surely, 2^68231957 is an apocalyptic number.

It is an amenable number.

68231957 is a deficient number, since it is larger than the sum of its proper divisors (1).

68231957 is an equidigital number, since it uses as much as digits as its factorization.

68231957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 68231957 is about 8260.2637367096. The cubic root of 68231957 is about 408.6290856772.

The spelling of 68231957 in words is "sixty-eight million, two hundred thirty-one thousand, nine hundred fifty-seven".