97657913 has 4 divisors (see below), whose sum is σ = 97715748. Its totient is φ = 97600080.

The previous prime is 97657907. The next prime is 97657933. The reversal of 97657913 is 31975679.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6512704 + 91145209 = 2552^2 + 9547^2 .

It is a cyclic number.

It is not a de Polignac number, because 97657913 - 2⁶ = 97657849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97657933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26306 + ... + 29787.

It is an arithmetic number, because the mean of its divisors is an integer number (24428937).

Almost surely, 2^97657913 is an apocalyptic number.

It is an amenable number.

97657913 is a deficient number, since it is larger than the sum of its proper divisors (57835).

97657913 is a wasteful number, since it uses less digits than its factorization.

97657913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57834.

The product of its digits is 357210, while the sum is 47.

The square root of 97657913 is about 9882.2018295520. The cubic root of 97657913 is about 460.5065513075.

The spelling of 97657913 in words is "ninety-seven million, six hundred fifty-seven thousand, nine hundred thirteen".