135879865 has 16 divisors (see below), whose sum is σ = 178640640. Its totient is φ = 98398720.

The previous prime is 135879847. The next prime is 135879899. The reversal of 135879865 is 568978531.

It is not a de Polignac number, because 135879865 - 2⁵ = 135879833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7977 + ... + 18313.

It is an arithmetic number, because the mean of its divisors is an integer number (11165040).

Almost surely, 2^135879865 is an apocalyptic number.

It is an amenable number.

135879865 is a deficient number, since it is larger than the sum of its proper divisors (42760775).

135879865 is a wasteful number, since it uses less digits than its factorization.

135879865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10592.

The product of its digits is 1814400, while the sum is 52.

The square root of 135879865 is about 11656.7519060843. The cubic root of 135879865 is about 514.1048515071.

The spelling of 135879865 in words is "one hundred thirty-five million, eight hundred seventy-nine thousand, eight hundred sixty-five".