9899923 has 8 divisors (see below), whose sum is σ = 11004336. Its totient is φ = 8829600.

The previous prime is 9899921. The next prime is 9899947. The reversal of 9899923 is 3299989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9899923 - 2¹ = 9899921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9899921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7908 + ... + 9073.

It is an arithmetic number, because the mean of its divisors is an integer number (1375542).

Almost surely, 2^9899923 is an apocalyptic number.

9899923 is a deficient number, since it is larger than the sum of its proper divisors (1104413).

9899923 is a wasteful number, since it uses less digits than its factorization.

9899923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17045.

The product of its digits is 314928, while the sum is 49.

The square root of 9899923 is about 3146.4143083834. The cubic root of 9899923 is about 214.7223602114.

The spelling of 9899923 in words is "nine million, eight hundred ninety-nine thousand, nine hundred twenty-three".