135505879 has 8 divisors (see below), whose sum is σ = 136593072. Its totient is φ = 134423040.

The previous prime is 135505847. The next prime is 135505889. The reversal of 135505879 is 978505531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135505879 - 2⁵ = 135505847 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 (135505819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88212 + ... + 89734.

It is an arithmetic number, because the mean of its divisors is an integer number (17074134).

Almost surely, 2^135505879 is an apocalyptic number.

135505879 is a deficient number, since it is larger than the sum of its proper divisors (1087193).

135505879 is a wasteful number, since it uses less digits than its factorization.

135505879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177.

The product of its (nonzero) digits is 189000, while the sum is 43.

The square root of 135505879 is about 11640.6992487565. The cubic root of 135505879 is about 513.6327563415.

The spelling of 135505879 in words is "one hundred thirty-five million, five hundred five thousand, eight hundred seventy-nine".