97640177 has 4 divisors (see below), whose sum is σ = 97660836. Its totient is φ = 97619520.

The previous prime is 97640171. The next prime is 97640203. The reversal of 97640177 is 77104679.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77104679 = 19 ⋅4058141.

It can be written as a sum of positive squares in 2 ways, for example, as 7845601 + 89794576 = 2801^2 + 9476^2 .

It is a cyclic number.

It is not a de Polignac number, because 97640177 - 2¹⁰ = 97639153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97640171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653 + ... + 13989.

It is an arithmetic number, because the mean of its divisors is an integer number (24415209).

Almost surely, 2^97640177 is an apocalyptic number.

It is an amenable number.

97640177 is a deficient number, since it is larger than the sum of its proper divisors (20659).

97640177 is a wasteful number, since it uses less digits than its factorization.

97640177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20658.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 97640177 is about 9881.3044179400. The cubic root of 97640177 is about 460.4786715435.

The spelling of 97640177 in words is "ninety-seven million, six hundred forty thousand, one hundred seventy-seven".