135558409 has 16 divisors (see below), whose sum is σ = 158489856. Its totient is φ = 113544000.

The previous prime is 135558377. The next prime is 135558413. The reversal of 135558409 is 904855531.

It is a cyclic number.

It is not a de Polignac number, because 135558409 - 2⁵ = 135558377 is a prime.

It is a super-2 number, since 2×135558409² = 36752164501222562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135558419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70359 + ... + 72259.

It is an arithmetic number, because the mean of its divisors is an integer number (9905616).

Almost surely, 2^135558409 is an apocalyptic number.

It is an amenable number.

135558409 is a deficient number, since it is larger than the sum of its proper divisors (22931447).

135558409 is a wasteful number, since it uses less digits than its factorization.

135558409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 135558409 is about 11642.9553378857. The cubic root of 135558409 is about 513.6991191275.

The spelling of 135558409 in words is "one hundred thirty-five million, five hundred fifty-eight thousand, four hundred nine".