97156978 has 8 divisors (see below), whose sum is σ = 147491568. Its totient is φ = 47993124.

The previous prime is 97156967. The next prime is 97156993. The reversal of 97156978 is 87965179.

It is a happy number.

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

It is a super-3 number, since 3×97156978³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292476 + ... + 292807.

It is an arithmetic number, because the mean of its divisors is an integer number (18436446).

Almost surely, 2^97156978 is an apocalyptic number.

97156978 is a deficient number, since it is larger than the sum of its proper divisors (50334590).

97156978 is a wasteful number, since it uses less digits than its factorization.

97156978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585368.

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

The square root of 97156978 is about 9856.8239306584. The cubic root of 97156978 is about 459.7178136961.

The spelling of 97156978 in words is "ninety-seven million, one hundred fifty-six thousand, nine hundred seventy-eight".