99997912 has 32 divisors (see below), whose sum is σ = 225561600. Its totient is φ = 40600224.

The previous prime is 99997907. The next prime is 99997913. The reversal of 99997912 is 21979999.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99997913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45928 + ... + 48055.

It is an arithmetic number, because the mean of its divisors is an integer number (7048800).

Almost surely, 2^99997912 is an apocalyptic number.

It is an amenable number.

99997912 is an abundant number, since it is smaller than the sum of its proper divisors (125563688).

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

99997912 is a wasteful number, since it uses less digits than its factorization.

99997912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94015 (or 94011 counting only the distinct ones).

The product of its digits is 826686, while the sum is 55.

The square root of 99997912 is about 9999.8955994550. The cubic root of 99997912 is about 464.1556527930.

The spelling of 99997912 in words is "ninety-nine million, nine hundred ninety-seven thousand, nine hundred twelve".