97129878 has 8 divisors (see below), whose sum is σ = 194259768. Its totient is φ = 32376624.

The previous prime is 97129829. The next prime is 97129889. The reversal of 97129878 is 87892179.

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

97129878 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 97129878.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8094151 + ... + 8094162.

It is an arithmetic number, because the mean of its divisors is an integer number (24282471).

Almost surely, 2^97129878 is an apocalyptic number.

97129878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

97129878 is a wasteful number, since it uses less digits than its factorization.

97129878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16188318.

The product of its digits is 508032, while the sum is 51.

The square root of 97129878 is about 9855.4491526262. The cubic root of 97129878 is about 459.6750666850.

The spelling of 97129878 in words is "ninety-seven million, one hundred twenty-nine thousand, eight hundred seventy-eight".