9999923 has 8 divisors (see below), whose sum is σ = 10186176. Its totient is φ = 9815400.

The previous prime is 9999907. The next prime is 9999929. The reversal of 9999923 is 3299999.

9999923 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 9999923 - 2⁴ = 9999907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9999929) 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, 17228 + ... + 17798.

It is an arithmetic number, because the mean of its divisors is an integer number (1273272).

Almost surely, 2^9999923 is an apocalyptic number.

9999923 is a deficient number, since it is larger than the sum of its proper divisors (186253).

9999923 is a wasteful number, since it uses less digits than its factorization.

9999923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865.

The product of its digits is 354294, while the sum is 50.

The square root of 9999923 is about 3162.2654853760. The cubic root of 9999923 is about 215.4429160302.

The spelling of 9999923 in words is "nine million, nine hundred ninety-nine thousand, nine hundred twenty-three".