23009423 has 4 divisors (see below), whose sum is σ = 23030088. Its totient is φ = 22988760.

The previous prime is 23009419. The next prime is 23009443. The reversal of 23009423 is 32490032.

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 23009423 - 2² = 23009419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23009443) 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, 8561 + ... + 10922.

It is an arithmetic number, because the mean of its divisors is an integer number (5757522).

Almost surely, 2^23009423 is an apocalyptic number.

23009423 is a deficient number, since it is larger than the sum of its proper divisors (20665).

23009423 is a wasteful number, since it uses less digits than its factorization.

23009423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20664.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 23009423 is about 4796.8138383723. The cubic root of 23009423 is about 284.4255300138.

Adding to 23009423 its reverse (32490032), we get a palindrome (55499455).

It can be divided in two parts, 23009 and 423, that added together give a palindrome (23432).

The spelling of 23009423 in words is "twenty-three million, nine thousand, four hundred twenty-three".