13689687 has 16 divisors (see below), whose sum is σ = 20103552. Its totient is φ = 8217120.

The previous prime is 13689677. The next prime is 13689691. The reversal of 13689687 is 78698631.

It is not a de Polignac number, because 13689687 - 2¹⁶ = 13624151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13689647) 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 15 ways as a sum of consecutive naturals, for example, 1593 + ... + 5469.

It is an arithmetic number, because the mean of its divisors is an integer number (1256472).

Almost surely, 2^13689687 is an apocalyptic number.

13689687 is a deficient number, since it is larger than the sum of its proper divisors (6413865).

13689687 is a wasteful number, since it uses less digits than its factorization.

13689687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998.

The product of its digits is 435456, while the sum is 48.

The square root of 13689687 is about 3699.9577024609. The cubic root of 13689687 is about 239.2201947041.

The spelling of 13689687 in words is "thirteen million, six hundred eighty-nine thousand, six hundred eighty-seven".