135499879 has 4 divisors (see below), whose sum is σ = 137408400. Its totient is φ = 133591360.

The previous prime is 135499867. The next prime is 135499927. The reversal of 135499879 is 978994531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135499879 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 (135499829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954154 + ... + 954295.

It is an arithmetic number, because the mean of its divisors is an integer number (34352100).

Almost surely, 2^135499879 is an apocalyptic number.

135499879 is a deficient number, since it is larger than the sum of its proper divisors (1908521).

135499879 is an equidigital number, since it uses as much as digits as its factorization.

135499879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908520.

The product of its digits is 2449440, while the sum is 55.

The square root of 135499879 is about 11640.4415294266. The cubic root of 135499879 is about 513.6251752633.

The spelling of 135499879 in words is "one hundred thirty-five million, four hundred ninety-nine thousand, eight hundred seventy-nine".