23123839 has 4 divisors (see below), whose sum is σ = 23133600. Its totient is φ = 23114080.

The previous prime is 23123833. The next prime is 23123843. The reversal of 23123839 is 93832132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23123839 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23123839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123833) 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, 1194 + ... + 6904.

It is an arithmetic number, because the mean of its divisors is an integer number (5783400).

Almost surely, 2^23123839 is an apocalyptic number.

23123839 is a deficient number, since it is larger than the sum of its proper divisors (9761).

23123839 is an equidigital number, since it uses as much as digits as its factorization.

23123839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9760.

The product of its digits is 7776, while the sum is 31.

The square root of 23123839 is about 4808.7252988708. The cubic root of 23123839 is about 284.8961928294.

The spelling of 23123839 in words is "twenty-three million, one hundred twenty-three thousand, eight hundred thirty-nine".