97978156 has 12 divisors (see below), whose sum is σ = 172420920. Its totient is φ = 48715040.

The previous prime is 97978141. The next prime is 97978169. The reversal of 97978156 is 65187979.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67705 + ... + 69136.

It is an arithmetic number, because the mean of its divisors is an integer number (14368410).

Almost surely, 2^97978156 is an apocalyptic number.

It is an amenable number.

97978156 is a deficient number, since it is larger than the sum of its proper divisors (74442764).

97978156 is a wasteful number, since it uses less digits than its factorization.

97978156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137024 (or 137022 counting only the distinct ones).

The product of its digits is 952560, while the sum is 52.

The square root of 97978156 is about 9898.3915865155. The cubic root of 97978156 is about 461.0093714324.

The spelling of 97978156 in words is "ninety-seven million, nine hundred seventy-eight thousand, one hundred fifty-six".