97991168 has 80 divisors (see below), whose sum is σ = 216843264. Its totient is φ = 43868160.

The previous prime is 97991141. The next prime is 97991171. The reversal of 97991168 is 86119979.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715196 + ... + 715332.

Almost surely, 2^97991168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97991168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108421632).

97991168 is an abundant number, since it is smaller than the sum of its proper divisors (118852096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97991168 is a wasteful number, since it uses less digits than its factorization.

97991168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 277 counting only the distinct ones).

The product of its digits is 244944, while the sum is 50.

The square root of 97991168 is about 9899.0488431970. The cubic root of 97991168 is about 461.0297786628.

It can be divided in two parts, 979911 and 68, that added together give a palindrome (979979).

The spelling of 97991168 in words is "ninety-seven million, nine hundred ninety-one thousand, one hundred sixty-eight".