97979812 has 18 divisors (see below), whose sum is σ = 199459302. Its totient is φ = 41991264.

The previous prime is 97979807. The next prime is 97979813. The reversal of 97979812 is 21897979.

It can be written as a sum of positive squares in only one way, i.e., 91699776 + 6280036 = 9576^2 + 2506^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 97979812.

It is not an unprimeable number, because it can be changed into a prime (97979813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 249753 + ... + 250144.

Almost surely, 2^97979812 is an apocalyptic number.

It is an amenable number.

97979812 is an abundant number, since it is smaller than the sum of its proper divisors (101479490).

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

97979812 is a wasteful number, since it uses less digits than its factorization.

97979812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499915 (or 499906 counting only the distinct ones).

The product of its digits is 571536, while the sum is 52.

The square root of 97979812 is about 9898.4752361159. The cubic root of 97979812 is about 461.0119687025.

The spelling of 97979812 in words is "ninety-seven million, nine hundred seventy-nine thousand, eight hundred twelve".