8135689 has 4 divisors (see below), whose sum is σ = 8416260. Its totient is φ = 7855120.

The previous prime is 8135641. The next prime is 8135713. The reversal of 8135689 is 9865318.

It is a happy number.

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 1334025 + 6801664 = 1155^2 + 2608^2 .

It is a cyclic number.

It is not a de Polignac number, because 8135689 - 2⁹ = 8135177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8135189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140242 + ... + 140299.

It is an arithmetic number, because the mean of its divisors is an integer number (2104065).

Almost surely, 2^8135689 is an apocalyptic number.

It is an amenable number.

8135689 is a deficient number, since it is larger than the sum of its proper divisors (280571).

8135689 is a wasteful number, since it uses less digits than its factorization.

8135689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280570.

The product of its digits is 51840, while the sum is 40.

The square root of 8135689 is about 2852.3129211221. The cubic root of 8135689 is about 201.1244083495.

The spelling of 8135689 in words is "eight million, one hundred thirty-five thousand, six hundred eighty-nine".