23984639 has 4 divisors (see below), whose sum is σ = 27411024. Its totient is φ = 20558256.

The previous prime is 23984629. The next prime is 23984647. The reversal of 23984639 is 93648932.

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

It is a cyclic number.

It is not a de Polignac number, because 23984639 - 2⁸ = 23984383 is a prime.

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 23984639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23984629) 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, 1713182 + ... + 1713195.

It is an arithmetic number, because the mean of its divisors is an integer number (6852756).

Almost surely, 2^23984639 is an apocalyptic number.

23984639 is a deficient number, since it is larger than the sum of its proper divisors (3426385).

23984639 is an equidigital number, since it uses as much as digits as its factorization.

23984639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3426384.

The product of its digits is 279936, while the sum is 44.

The square root of 23984639 is about 4897.4114591282. The cubic root of 23984639 is about 288.3883609395.

The spelling of 23984639 in words is "twenty-three million, nine hundred eighty-four thousand, six hundred thirty-nine".