13687914321 has 12 divisors (see below), whose sum is σ = 19792544772. Its totient is φ = 9115531776.

The previous prime is 13687914299. The next prime is 13687914323. The reversal of 13687914321 is 12341978631.

13687914321 is a `hidden beast` number, since 136 + 87 + 9 + 1 + 432 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3731865921 + 9956048400 = 61089^2 + 99780^2 .

It is not a de Polignac number, because 13687914321 - 2⁹ = 13687913809 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13687914323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 803136 + ... + 820001.

It is an arithmetic number, because the mean of its divisors is an integer number (1649378731).

Almost surely, 2^13687914321 is an apocalyptic number.

It is an amenable number.

13687914321 is a deficient number, since it is larger than the sum of its proper divisors (6104630451).

13687914321 is a wasteful number, since it uses less digits than its factorization.

13687914321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624080 (or 1624077 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The spelling of 13687914321 in words is "thirteen billion, six hundred eighty-seven million, nine hundred fourteen thousand, three hundred twenty-one".