23421639 has 8 divisors (see below), whose sum is σ = 31454080. Its totient is φ = 15501816.

The previous prime is 23421617. The next prime is 23421641. The reversal of 23421639 is 93612432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23421639 - 2⁷ = 23421511 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 (23421649) 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 7 ways as a sum of consecutive naturals, for example, 27667 + ... + 28500.

It is an arithmetic number, because the mean of its divisors is an integer number (3931760).

Almost surely, 2^23421639 is an apocalyptic number.

23421639 is a deficient number, since it is larger than the sum of its proper divisors (8032441).

23421639 is a wasteful number, since it uses less digits than its factorization.

23421639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56309.

The product of its digits is 7776, while the sum is 30.

The square root of 23421639 is about 4839.5907884862. The cubic root of 23421639 is about 286.1139902923.

The spelling of 23421639 in words is "twenty-three million, four hundred twenty-one thousand, six hundred thirty-nine".