97656589 has 2 divisors, whose sum is σ = 97656590. Its totient is φ = 97656588.

The previous prime is 97656571. The next prime is 97656613. The reversal of 97656589 is 98565679.

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., 78907689 + 18748900 = 8883^2 + 4330^2 .

It is a cyclic number.

It is not a de Polignac number, because 97656589 - 2⁹ = 97656077 is a prime.

It is a super-2 number, since 2×97656589² = 19073618750229842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97656509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48828294 + 48828295.

It is an arithmetic number, because the mean of its divisors is an integer number (48828295).

Almost surely, 2^97656589 is an apocalyptic number.

It is an amenable number.

97656589 is a deficient number, since it is larger than the sum of its proper divisors (1).

97656589 is an equidigital number, since it uses as much as digits as its factorization.

97656589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4082400, while the sum is 55.

The square root of 97656589 is about 9882.1348402053. The cubic root of 97656589 is about 460.5044701877.

The spelling of 97656589 in words is "ninety-seven million, six hundred fifty-six thousand, five hundred eighty-nine".