68831057 has 2 divisors, whose sum is σ = 68831058. Its totient is φ = 68831056.

The previous prime is 68831051. The next prime is 68831069. The reversal of 68831057 is 75013886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51782416 + 17048641 = 7196^2 + 4129^2 .

It is a cyclic number.

It is not a de Polignac number, because 68831057 - 2¹⁴ = 68814673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68831057.

It is not a weakly prime, because it can be changed into another prime (68831051) 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, 34415528 + 34415529.

It is an arithmetic number, because the mean of its divisors is an integer number (34415529).

Almost surely, 2^68831057 is an apocalyptic number.

It is an amenable number.

68831057 is a deficient number, since it is larger than the sum of its proper divisors (1).

68831057 is an equidigital number, since it uses as much as digits as its factorization.

68831057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 68831057 is about 8296.4484570206. The cubic root of 68831057 is about 409.8215701882.

The spelling of 68831057 in words is "sixty-eight million, eight hundred thirty-one thousand, fifty-seven".