9929998 has 16 divisors (see below), whose sum is σ = 16092720. Its totient is φ = 4568256.

The previous prime is 9929993. The next prime is 9929999. The reversal of 9929998 is 8999299.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9929993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15733 + ... + 16351.

It is an arithmetic number, because the mean of its divisors is an integer number (1005795).

Almost surely, 2^9929998 is an apocalyptic number.

9929998 is a deficient number, since it is larger than the sum of its proper divisors (6162722).

9929998 is a wasteful number, since it uses less digits than its factorization.

9929998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251.

The product of its digits is 944784, while the sum is 55.

The square root of 9929998 is about 3151.1899339773. The cubic root of 9929998 is about 214.9395755923.

The spelling of 9929998 in words is "nine million, nine hundred twenty-nine thousand, nine hundred ninety-eight".