99999923 has 8 divisors (see below), whose sum is σ = 103560336. Its totient is φ = 96501600.

The previous prime is 99999847. The next prime is 99999931. The reversal of 99999923 is 32999999.

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 99999923 - 2¹⁸ = 99737779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99999323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12233 + ... + 18698.

It is an arithmetic number, because the mean of its divisors is an integer number (12945042).

Almost surely, 2^99999923 is an apocalyptic number.

99999923 is a deficient number, since it is larger than the sum of its proper divisors (3560413).

99999923 is a wasteful number, since it uses less digits than its factorization.

99999923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31045.

The product of its digits is 3188646, while the sum is 59.

The square root of 99999923 is about 9999.9961499993. The cubic root of 99999923 is about 464.1587642271.

The spelling of 99999923 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred twenty-three".