23924639 has 4 divisors (see below), whose sum is σ = 23946960. Its totient is φ = 23902320.

The previous prime is 23924633. The next prime is 23924647. The reversal of 23924639 is 93642932.

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 23924639 - 2¹⁶ = 23859103 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 (23924633) 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, 9467 + ... + 11724.

It is an arithmetic number, because the mean of its divisors is an integer number (5986740).

Almost surely, 2^23924639 is an apocalyptic number.

23924639 is a deficient number, since it is larger than the sum of its proper divisors (22321).

23924639 is a wasteful number, since it uses less digits than its factorization.

23924639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22320.

The product of its digits is 69984, while the sum is 38.

The square root of 23924639 is about 4891.2819383062. The cubic root of 23924639 is about 288.1476825843.

The spelling of 23924639 in words is "twenty-three million, nine hundred twenty-four thousand, six hundred thirty-nine".