13956639 has 8 divisors (see below), whose sum is σ = 19041792. Its totient is φ = 9087960.

The previous prime is 13956637. The next prime is 13956661. The reversal of 13956639 is 93665931.

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

It is not a de Polignac number, because 13956639 - 2¹ = 13956637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13956639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13956637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53967 + ... + 54224.

It is an arithmetic number, because the mean of its divisors is an integer number (2380224).

Almost surely, 2^13956639 is an apocalyptic number.

13956639 is a deficient number, since it is larger than the sum of its proper divisors (5085153).

13956639 is a wasteful number, since it uses less digits than its factorization.

13956639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108237.

The product of its digits is 131220, while the sum is 42.

The square root of 13956639 is about 3735.8585358656. The cubic root of 13956639 is about 240.7651448522.

The spelling of 13956639 in words is "thirteen million, nine hundred fifty-six thousand, six hundred thirty-nine".