135656879 has 4 divisors (see below), whose sum is σ = 135680184. Its totient is φ = 135633576.

The previous prime is 135656869. The next prime is 135656881. The reversal of 135656879 is 978656531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 135656879 - 2²⁰ = 134608303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135656869) 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, 5324 + ... + 17310.

It is an arithmetic number, because the mean of its divisors is an integer number (33920046).

Almost surely, 2^135656879 is an apocalyptic number.

135656879 is a deficient number, since it is larger than the sum of its proper divisors (23305).

135656879 is a wasteful number, since it uses less digits than its factorization.

135656879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23304.

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

The square root of 135656879 is about 11647.1833075641. The cubic root of 135656879 is about 513.8234731716.

The spelling of 135656879 in words is "one hundred thirty-five million, six hundred fifty-six thousand, eight hundred seventy-nine".