97657697 has 2 divisors, whose sum is σ = 97657698. Its totient is φ = 97657696.

The previous prime is 97657669. The next prime is 97657709. The reversal of 97657697 is 79675679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97140736 + 516961 = 9856^2 + 719^2 .

It is an emirp because it is prime and its reverse (79675679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97657697 - 2¹² = 97653601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97657627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48828848 + 48828849.

It is an arithmetic number, because the mean of its divisors is an integer number (48828849).

Almost surely, 2^97657697 is an apocalyptic number.

It is an amenable number.

97657697 is a deficient number, since it is larger than the sum of its proper divisors (1).

97657697 is an equidigital number, since it uses as much as digits as its factorization.

97657697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5000940, while the sum is 56.

The square root of 97657697 is about 9882.1909008074. The cubic root of 97657697 is about 460.5062117907.

The spelling of 97657697 in words is "ninety-seven million, six hundred fifty-seven thousand, six hundred ninety-seven".