968647657 has 2 divisors, whose sum is σ = 968647658. Its totient is φ = 968647656.

The previous prime is 968647651. The next prime is 968647699. The reversal of 968647657 is 756746869.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 832668736 + 135978921 = 28856^2 + 11661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-968647657 is a prime.

It is not a weakly prime, because it can be changed into another prime (968647651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484323828 + 484323829.

It is an arithmetic number, because the mean of its divisors is an integer number (484323829).

Almost surely, 2^968647657 is an apocalyptic number.

It is an amenable number.

968647657 is a deficient number, since it is larger than the sum of its proper divisors (1).

968647657 is an equidigital number, since it uses as much as digits as its factorization.

968647657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 58.

The square root of 968647657 is about 31123.1048740321. The cubic root of 968647657 is about 989.4380571069.

The spelling of 968647657 in words is "nine hundred sixty-eight million, six hundred forty-seven thousand, six hundred fifty-seven".