97985931 has 8 divisors (see below), whose sum is σ = 130795584. Its totient is φ = 65250120.

The previous prime is 97985903. The next prime is 97985933. The reversal of 97985931 is 13958979.

It is a happy number.

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

It is not a de Polignac number, because 97985931 - 2¹¹ = 97983883 is a prime.

It is a super-2 number, since 2×97985931² = 19202485347873522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (97985933) 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, 15285 + ... + 20726.

It is an arithmetic number, because the mean of its divisors is an integer number (16349448).

Almost surely, 2^97985931 is an apocalyptic number.

97985931 is a deficient number, since it is larger than the sum of its proper divisors (32809653).

97985931 is a wasteful number, since it uses less digits than its factorization.

97985931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36921.

The product of its digits is 612360, while the sum is 51.

The square root of 97985931 is about 9898.7843192990. The cubic root of 97985931 is about 461.0215654873.

The spelling of 97985931 in words is "ninety-seven million, nine hundred eighty-five thousand, nine hundred thirty-one".