9899924 has 12 divisors (see below), whose sum is σ = 17402784. Its totient is φ = 4927704.

The previous prime is 9899921. The next prime is 9899947. The reversal of 9899924 is 4299989.

9899924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899921) 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, 4544 + ... + 6359.

It is an arithmetic number, because the mean of its divisors is an integer number (1450232).

Almost surely, 2^9899924 is an apocalyptic number.

It is an amenable number.

9899924 is a deficient number, since it is larger than the sum of its proper divisors (7502860).

9899924 is a wasteful number, since it uses less digits than its factorization.

9899924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11134 (or 11132 counting only the distinct ones).

The product of its digits is 419904, while the sum is 50.

The square root of 9899924 is about 3146.4144672945. The cubic root of 9899924 is about 214.7223674412.

The spelling of 9899924 in words is "nine million, eight hundred ninety-nine thousand, nine hundred twenty-four".