97917878 has 8 divisors (see below), whose sum is σ = 147107880. Its totient is φ = 48881920.

The previous prime is 97917851. The next prime is 97917899. The reversal of 97917878 is 87871979.

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

It is a congruent 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, 36908 + ... + 39471.

It is an arithmetic number, because the mean of its divisors is an integer number (18388485).

Almost surely, 2^97917878 is an apocalyptic number.

97917878 is a deficient number, since it is larger than the sum of its proper divisors (49190002).

97917878 is a wasteful number, since it uses less digits than its factorization.

97917878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77022.

The product of its digits is 1778112, while the sum is 56.

The square root of 97917878 is about 9895.3462799439. The cubic root of 97917878 is about 460.9148114995.

The spelling of 97917878 in words is "ninety-seven million, nine hundred seventeen thousand, eight hundred seventy-eight".