23938813 has 4 divisors (see below), whose sum is σ = 23953468. Its totient is φ = 23924160.

The previous prime is 23938807. The next prime is 23938823. The reversal of 23938813 is 31883932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7601049 + 16337764 = 2757^2 + 4042^2 .

It is a cyclic number.

It is not a de Polignac number, because 23938813 - 2⁵ = 23938781 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 (23938823) 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, 4518 + ... + 8263.

It is an arithmetic number, because the mean of its divisors is an integer number (5988367).

Almost surely, 2^23938813 is an apocalyptic number.

It is an amenable number.

23938813 is a deficient number, since it is larger than the sum of its proper divisors (14655).

23938813 is a wasteful number, since it uses less digits than its factorization.

23938813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14654.

The product of its digits is 31104, while the sum is 37.

The square root of 23938813 is about 4892.7306281871. The cubic root of 23938813 is about 288.2045751037.

The spelling of 23938813 in words is "twenty-three million, nine hundred thirty-eight thousand, eight hundred thirteen".