13639109 has 4 divisors (see below), whose sum is σ = 14879040. Its totient is φ = 12399180.

The previous prime is 13639103. The next prime is 13639111. The reversal of 13639109 is 90193631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13639109 - 2²⁰ = 12590533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13639103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619949 + ... + 619970.

It is an arithmetic number, because the mean of its divisors is an integer number (3719760).

Almost surely, 2^13639109 is an apocalyptic number.

It is an amenable number.

13639109 is a deficient number, since it is larger than the sum of its proper divisors (1239931).

13639109 is a wasteful number, since it uses less digits than its factorization.

13639109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239930.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 13639109 is about 3693.1164346660. The cubic root of 13639109 is about 238.9252230134.

The spelling of 13639109 in words is "thirteen million, six hundred thirty-nine thousand, one hundred nine".