13855689 has 6 divisors (see below), whose sum is σ = 20013786. Its totient is φ = 9237120.

The previous prime is 13855679. The next prime is 13855703. The reversal of 13855689 is 98655831.

13855689 is a `hidden beast` number, since 1 + 3 + 85 + 568 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8643600 + 5212089 = 2940^2 + 2283^2 .

It is not a de Polignac number, because 13855689 - 2⁵ = 13855657 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13855679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 769752 + ... + 769769.

It is an arithmetic number, because the mean of its divisors is an integer number (3335631).

Almost surely, 2^13855689 is an apocalyptic number.

It is an amenable number.

13855689 is a deficient number, since it is larger than the sum of its proper divisors (6158097).

13855689 is a wasteful number, since it uses less digits than its factorization.

13855689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539527 (or 1539524 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 13855689 is about 3722.3230649690. The cubic root of 13855689 is about 240.1832454690.

The spelling of 13855689 in words is "thirteen million, eight hundred fifty-five thousand, six hundred eighty-nine".