97156578 has 16 divisors (see below), whose sum is σ = 195090336. Its totient is φ = 32256000.

The previous prime is 97156559. The next prime is 97156589. The reversal of 97156578 is 87565179.

It is a Curzon 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, 30751 + ... + 33762.

It is an arithmetic number, because the mean of its divisors is an integer number (12193146).

Almost surely, 2^97156578 is an apocalyptic number.

97156578 is an abundant number, since it is smaller than the sum of its proper divisors (97933758).

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

97156578 is a wasteful number, since it uses less digits than its factorization.

97156578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64769.

The product of its digits is 529200, while the sum is 48.

The square root of 97156578 is about 9856.8036401259. The cubic root of 97156578 is about 459.7171828017.

The spelling of 97156578 in words is "ninety-seven million, one hundred fifty-six thousand, five hundred seventy-eight".