23993389 has 12 divisors (see below), whose sum is σ = 28012764. Its totient is φ = 20490624.

The previous prime is 23993377. The next prime is 23993399. The reversal of 23993389 is 98339932.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16540489 + 7452900 = 4067^2 + 2730^2 .

It is not a de Polignac number, because 23993389 - 2⁵ = 23993357 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 (23993309) 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 11 ways as a sum of consecutive naturals, for example, 15787 + ... + 17239.

It is an arithmetic number, because the mean of its divisors is an integer number (2334397).

Almost surely, 2^23993389 is an apocalyptic number.

It is an amenable number.

23993389 is a deficient number, since it is larger than the sum of its proper divisors (4019375).

23993389 is a wasteful number, since it uses less digits than its factorization.

23993389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804 (or 1797 counting only the distinct ones).

The product of its digits is 314928, while the sum is 46.

The square root of 23993389 is about 4898.3047067327. The cubic root of 23993389 is about 288.4234263184.

The spelling of 23993389 in words is "twenty-three million, nine hundred ninety-three thousand, three hundred eighty-nine".