97599978 has 112 divisors (see below), whose sum is σ = 256234176. Its totient is φ = 27293760.

The previous prime is 97599961. The next prime is 97599989. The reversal of 97599978 is 87999579.

It is a Harshad number since it is a multiple of its sum of digits (63).

Its product of digits (12859560) is a multiple of the sum of its prime divisors (216).

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 55 ways as a sum of consecutive naturals, for example, 744973 + ... + 745103.

Almost surely, 2^97599978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97599978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128117088).

97599978 is an abundant number, since it is smaller than the sum of its proper divisors (158634198).

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

97599978 is a wasteful number, since it uses less digits than its factorization.

97599978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 216 counting only the distinct ones).

The product of its digits is 12859560, while the sum is 63.

The square root of 97599978 is about 9879.2701147403. The cubic root of 97599978 is about 460.4154689986.

The spelling of 97599978 in words is "ninety-seven million, five hundred ninety-nine thousand, nine hundred seventy-eight".