99979964 has 12 divisors (see below), whose sum is σ = 199959984. Its totient is φ = 42848544.

The previous prime is 99979963. The next prime is 99979967. The reversal of 99979964 is 46997999.

99979964 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 99979897 and 99979906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99979961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785329 + ... + 1785384.

It is an arithmetic number, because the mean of its divisors is an integer number (16663332).

Almost surely, 2^99979964 is an apocalyptic number.

It is an amenable number.

99979964 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.

99979964 is a wasteful number, since it uses less digits than its factorization.

99979964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570724 (or 3570722 counting only the distinct ones).

The product of its digits is 9920232, while the sum is 62.

The square root of 99979964 is about 9998.9981498148. The cubic root of 99979964 is about 464.1278816661.

The spelling of 99979964 in words is "ninety-nine million, nine hundred seventy-nine thousand, nine hundred sixty-four".