99997924 has 12 divisors (see below), whose sum is σ = 188457724. Its totient is φ = 46152864.

The previous prime is 99997913. The next prime is 99997949. The reversal of 99997924 is 42979999.

It can be written as a sum of positive squares in 2 ways, for example, as 60559524 + 39438400 = 7782^2 + 6280^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961467 + ... + 961570.

Almost surely, 2^99997924 is an apocalyptic number.

It is an amenable number.

99997924 is a deficient number, since it is larger than the sum of its proper divisors (88459800).

99997924 is a wasteful number, since it uses less digits than its factorization.

99997924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923054 (or 1923052 counting only the distinct ones).

The product of its digits is 3306744, while the sum is 58.

The square root of 99997924 is about 9999.8961994613. The cubic root of 99997924 is about 464.1556713596.

The spelling of 99997924 in words is "ninety-nine million, nine hundred ninety-seven thousand, nine hundred twenty-four".