23909923 has 4 divisors (see below), whose sum is σ = 25168360. Its totient is φ = 22651488.

The previous prime is 23909911. The next prime is 23909947. The reversal of 23909923 is 32990932.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23909923 - 2⁹ = 23909411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23909993) 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 3 ways as a sum of consecutive naturals, for example, 629190 + ... + 629227.

It is an arithmetic number, because the mean of its divisors is an integer number (6292090).

Almost surely, 2^23909923 is an apocalyptic number.

23909923 is a deficient number, since it is larger than the sum of its proper divisors (1258437).

23909923 is a wasteful number, since it uses less digits than its factorization.

23909923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258436.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 23909923 is about 4889.7773977963. Note that the first 3 decimals coincide. The cubic root of 23909923 is about 288.0885907695.

The spelling of 23909923 in words is "twenty-three million, nine hundred nine thousand, nine hundred twenty-three".