23639013 has 8 divisors (see below), whose sum is σ = 35020800. Its totient is φ = 15759324.

The previous prime is 23639003. The next prime is 23639039. The reversal of 23639013 is 31093632.

23639013 is a `hidden beast` number, since 23 + 639 + 0 + 1 + 3 = 666.

It is not a de Polignac number, because 23639013 - 2⁹ = 23638501 is a prime.

It is a super-2 number, since 2×23639013² = 1117605871228338, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 875519 = 23639013 / (2 + 3 + 6 + 3 + 9 + 0 + 1 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23639003) 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, 437733 + ... + 437786.

It is an arithmetic number, because the mean of its divisors is an integer number (4377600).

Almost surely, 2^23639013 is an apocalyptic number.

It is an amenable number.

23639013 is a deficient number, since it is larger than the sum of its proper divisors (11381787).

23639013 is an equidigital number, since it uses as much as digits as its factorization.

23639013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875528 (or 875522 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 23639013 is about 4861.9968120105. The cubic root of 23639013 is about 286.9963982762.

The spelling of 23639013 in words is "twenty-three million, six hundred thirty-nine thousand, thirteen".