135879869 has 4 divisors (see below), whose sum is σ = 136086720. Its totient is φ = 135673020.

The previous prime is 135879847. The next prime is 135879899. The reversal of 135879869 is 968978531.

135879869 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135879869 is a prime.

It is a super-2 number, since 2×135879869² = 36926677598914322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135879899) 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, 102437 + ... + 103754.

It is an arithmetic number, because the mean of its divisors is an integer number (34021680).

Almost surely, 2^135879869 is an apocalyptic number.

It is an amenable number.

135879869 is a deficient number, since it is larger than the sum of its proper divisors (206851).

135879869 is an equidigital number, since it uses as much as digits as its factorization.

135879869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206850.

The product of its digits is 3265920, while the sum is 56.

The square root of 135879869 is about 11656.7520776587. The cubic root of 135879869 is about 514.1048565518.

The spelling of 135879869 in words is "one hundred thirty-five million, eight hundred seventy-nine thousand, eight hundred sixty-nine".