9688535257 has 2 divisors, whose sum is σ = 9688535258. Its totient is φ = 9688535256.

The previous prime is 9688535177. The next prime is 9688535261. The reversal of 9688535257 is 7525358869.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6599287696 + 3089247561 = 81236^2 + 55581^2 .

It is a cyclic number.

It is not a de Polignac number, because 9688535257 - 2²⁷ = 9554317529 is a prime.

It is a super-2 number, since 2×9688535257² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9688535357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4844267628 + 4844267629.

It is an arithmetic number, because the mean of its divisors is an integer number (4844267629).

Almost surely, 2^9688535257 is an apocalyptic number.

It is an amenable number.

9688535257 is a deficient number, since it is larger than the sum of its proper divisors (1).

9688535257 is an equidigital number, since it uses as much as digits as its factorization.

9688535257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144000, while the sum is 58.

The square root of 9688535257 is about 98430.3573954702. The cubic root of 9688535257 is about 2131.8306799422.

The spelling of 9688535257 in words is "nine billion, six hundred eighty-eight million, five hundred thirty-five thousand, two hundred fifty-seven".