97665977 has 8 divisors (see below), whose sum is σ = 102753672. Its totient is φ = 92707200.

The previous prime is 97665949. The next prime is 97665991. The reversal of 97665977 is 77956679.

It can be written as a sum of positive squares in 4 ways, for example, as 19855936 + 77810041 = 4456^2 + 8821^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 97665977 - 2⁸ = 97665721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97665917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30674 + ... + 33707.

It is an arithmetic number, because the mean of its divisors is an integer number (12844209).

Almost surely, 2^97665977 is an apocalyptic number.

It is an amenable number.

97665977 is a deficient number, since it is larger than the sum of its proper divisors (5087695).

97665977 is a wasteful number, since it uses less digits than its factorization.

97665977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64459.

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

The square root of 97665977 is about 9882.6098273685. The cubic root of 97665977 is about 460.5192262409.

The spelling of 97665977 in words is "ninety-seven million, six hundred sixty-five thousand, nine hundred seventy-seven".