23209823 has 8 divisors (see below), whose sum is σ = 28566048. Its totient is φ = 18363744.

The previous prime is 23209819. The next prime is 23209843. The reversal of 23209823 is 32890232.

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

It is not a de Polignac number, because 23209823 - 2² = 23209819 is a prime.

It is a super-3 number, since 3×23209823³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23209843) 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, 127436 + ... + 127617.

It is an arithmetic number, because the mean of its divisors is an integer number (3570756).

Almost surely, 2^23209823 is an apocalyptic number.

23209823 is a deficient number, since it is larger than the sum of its proper divisors (5356225).

23209823 is a wasteful number, since it uses less digits than its factorization.

23209823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255073.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 23209823 is about 4817.6574182895. The cubic root of 23209823 is about 285.2488766850.

The spelling of 23209823 in words is "twenty-three million, two hundred nine thousand, eight hundred twenty-three".