9908999 has 4 divisors (see below), whose sum is σ = 9915360. Its totient is φ = 9902640.

The previous prime is 9908957. The next prime is 9909001. The reversal of 9908999 is 9998099.

It is a happy number.

9908999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9908999 is a prime.

It is a super-2 number, since 2×9908999² = 196376522364002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9908999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9908939) 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, 914 + ... + 4544.

It is an arithmetic number, because the mean of its divisors is an integer number (2478840).

Almost surely, 2^9908999 is an apocalyptic number.

9908999 is a deficient number, since it is larger than the sum of its proper divisors (6361).

9908999 is a wasteful number, since it uses less digits than its factorization.

9908999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360.

The product of its (nonzero) digits is 472392, while the sum is 53.

The square root of 9908999 is about 3147.8562546597. The cubic root of 9908999 is about 214.7879575196.

The spelling of 9908999 in words is "nine million, nine hundred eight thousand, nine hundred ninety-nine".