97957665 has 24 divisors (see below), whose sum is σ = 182855400. Its totient is φ = 48225024.

The previous prime is 97957661. The next prime is 97957687. The reversal of 97957665 is 56675979.

97957665 is a `hidden beast` number, since 9 + 7 + 9 + 576 + 65 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7056 + 97950609 = 84^2 + 9897^2 .

It is not a de Polignac number, because 97957665 - 2² = 97957661 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (97957661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83140 + ... + 84309.

It is an arithmetic number, because the mean of its divisors is an integer number (7618975).

Almost surely, 2^97957665 is an apocalyptic number.

It is an amenable number.

97957665 is a deficient number, since it is larger than the sum of its proper divisors (84897735).

97957665 is a wasteful number, since it uses less digits than its factorization.

97957665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167473 (or 167470 counting only the distinct ones).

The product of its digits is 3572100, while the sum is 54.

The square root of 97957665 is about 9897.3564652386. The cubic root of 97957665 is about 460.9772309294.

The spelling of 97957665 in words is "ninety-seven million, nine hundred fifty-seven thousand, six hundred sixty-five".