97972117 has 4 divisors (see below), whose sum is σ = 98186956. Its totient is φ = 97757280.

The previous prime is 97972099. The next prime is 97972123. The reversal of 97972117 is 71127979.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81252196 + 16719921 = 9014^2 + 4089^2 .

It is a cyclic number.

It is not a de Polignac number, because 97972117 - 2¹⁵ = 97939349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97972187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106734 + ... + 107647.

It is an arithmetic number, because the mean of its divisors is an integer number (24546739).

Almost surely, 2^97972117 is an apocalyptic number.

It is an amenable number.

97972117 is a deficient number, since it is larger than the sum of its proper divisors (214839).

97972117 is a wasteful number, since it uses less digits than its factorization.

97972117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214838.

The product of its digits is 55566, while the sum is 43.

The square root of 97972117 is about 9898.0865322546. The cubic root of 97972117 is about 460.9998996177. Note that the first 3 decimals are identical.

It can be divided in two parts, 97972 and 117, that added together give a palindrome (98089).

The spelling of 97972117 in words is "ninety-seven million, nine hundred seventy-two thousand, one hundred seventeen".