97978113 has 8 divisors (see below), whose sum is σ = 145152800. Its totient is φ = 65318724.

The previous prime is 97978063. The next prime is 97978141. The reversal of 97978113 is 31187979.

It is not a de Polignac number, because 97978113 - 2¹² = 97974017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97978213) 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, 1814383 + ... + 1814436.

It is an arithmetic number, because the mean of its divisors is an integer number (18144100).

Almost surely, 2^97978113 is an apocalyptic number.

It is an amenable number.

97978113 is a deficient number, since it is larger than the sum of its proper divisors (47174687).

97978113 is a wasteful number, since it uses less digits than its factorization.

97978113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3628828 (or 3628822 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 97978113 is about 9898.3894144452. The cubic root of 97978113 is about 461.0093039908.

The spelling of 97978113 in words is "ninety-seven million, nine hundred seventy-eight thousand, one hundred thirteen".