68857937 has 2 divisors, whose sum is σ = 68857938. Its totient is φ = 68857936.

The previous prime is 68857931. The next prime is 68857949. The reversal of 68857937 is 73975886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61481281 + 7376656 = 7841^2 + 2716^2 .

It is a cyclic number.

It is not a de Polignac number, because 68857937 - 2²⁰ = 67809361 is a prime.

It is not a weakly prime, because it can be changed into another prime (68857931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34428968 + 34428969.

It is an arithmetic number, because the mean of its divisors is an integer number (34428969).

Almost surely, 2^68857937 is an apocalyptic number.

It is an amenable number.

68857937 is a deficient number, since it is larger than the sum of its proper divisors (1).

68857937 is an equidigital number, since it uses as much as digits as its factorization.

68857937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The square root of 68857937 is about 8298.0682691817. The cubic root of 68857937 is about 409.8749112749.

The spelling of 68857937 in words is "sixty-eight million, eight hundred fifty-seven thousand, nine hundred thirty-seven".