135679865 has 16 divisors (see below), whose sum is σ = 168464016. Its totient is φ = 104832000.

The previous prime is 135679853. The next prime is 135679897. The reversal of 135679865 is 568976531.

135679865 = 8236² + 8237².

It is a happy number.

135679865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2715904 + 132963961 = 1648^2 + 11531^2 .

It is not a de Polignac number, because 135679865 - 2⁶ = 135679801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17429 + ... + 23981.

It is an arithmetic number, because the mean of its divisors is an integer number (10529001).

Almost surely, 2^135679865 is an apocalyptic number.

135679865 is the 8237-th centered square number.

It is an amenable number.

135679865 is a deficient number, since it is larger than the sum of its proper divisors (32784151).

135679865 is a wasteful number, since it uses less digits than its factorization.

135679865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700.

The product of its digits is 1360800, while the sum is 50.

The square root of 135679865 is about 11648.1700279486. The cubic root of 135679865 is about 513.8524926592.

It can be divided in two parts, 13567 and 9865, that added together give a palindrome (23432).

The spelling of 135679865 in words is "one hundred thirty-five million, six hundred seventy-nine thousand, eight hundred sixty-five".