13423639 has 4 divisors (see below), whose sum is σ = 13447720. Its totient is φ = 13399560.

The previous prime is 13423583. The next prime is 13423643. The reversal of 13423639 is 93632431.

13423639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93632431 = 31 ⋅3020401.

It is a cyclic number.

It is not a de Polignac number, because 13423639 - 2⁷ = 13423511 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 13423639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13423649) 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, 11184 + ... + 12325.

It is an arithmetic number, because the mean of its divisors is an integer number (3361930).

Almost surely, 2^13423639 is an apocalyptic number.

13423639 is a deficient number, since it is larger than the sum of its proper divisors (24081).

13423639 is an equidigital number, since it uses as much as digits as its factorization.

13423639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24080.

The product of its digits is 11664, while the sum is 31.

The square root of 13423639 is about 3663.8284621418. The cubic root of 13423639 is about 237.6603622423.

The spelling of 13423639 in words is "thirteen million, four hundred twenty-three thousand, six hundred thirty-nine".