135570909 has 16 divisors (see below), whose sum is σ = 190572480. Its totient is φ = 85489920.

The previous prime is 135570899. The next prime is 135570917. The reversal of 135570909 is 909075531.

It is not a de Polignac number, because 135570909 - 2⁸ = 135570653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135570209) by changing a digit.

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, 45349 + ... + 48245.

It is an arithmetic number, because the mean of its divisors is an integer number (11910780).

Almost surely, 2^135570909 is an apocalyptic number.

135570909 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

135570909 is a deficient number, since it is larger than the sum of its proper divisors (55001571).

135570909 is a wasteful number, since it uses less digits than its factorization.

135570909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740.

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 135570909 is about 11643.4921307999. The cubic root of 135570909 is about 513.7149082418.

The spelling of 135570909 in words is "one hundred thirty-five million, five hundred seventy thousand, nine hundred nine".