13689205 has 4 divisors (see below), whose sum is σ = 16427052. Its totient is φ = 10951360.

The previous prime is 13689191. The next prime is 13689227. The reversal of 13689205 is 50298631.

13689205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1620529 + 12068676 = 1273^2 + 3474^2 .

It is not a de Polignac number, because 13689205 - 2⁹ = 13688693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1368916 + ... + 1368925.

It is an arithmetic number, because the mean of its divisors is an integer number (4106763).

Almost surely, 2^13689205 is an apocalyptic number.

It is an amenable number.

13689205 is a deficient number, since it is larger than the sum of its proper divisors (2737847).

13689205 is an equidigital number, since it uses as much as digits as its factorization.

13689205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737846.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 13689205 is about 3699.8925660078. The cubic root of 13689205 is about 239.2173871043.

The spelling of 13689205 in words is "thirteen million, six hundred eighty-nine thousand, two hundred five".