135929909 has 4 divisors (see below), whose sum is σ = 143925804. Its totient is φ = 127934016.

The previous prime is 135929891. The next prime is 135929939. The reversal of 135929909 is 909929531.

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

It can be written as a sum of positive squares in 2 ways, for example, as 50367409 + 85562500 = 7097^2 + 9250^2 .

It is a cyclic number.

It is not a de Polignac number, because 135929909 - 2¹⁶ = 135864373 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 (135929939) 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, 3997922 + ... + 3997955.

It is an arithmetic number, because the mean of its divisors is an integer number (35981451).

Almost surely, 2^135929909 is an apocalyptic number.

It is an amenable number.

135929909 is a deficient number, since it is larger than the sum of its proper divisors (7995895).

135929909 is an equidigital number, since it uses as much as digits as its factorization.

135929909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7995894.

The product of its (nonzero) digits is 196830, while the sum is 47.

The square root of 135929909 is about 11658.8982755662. The cubic root of 135929909 is about 514.1679580004.

The spelling of 135929909 in words is "one hundred thirty-five million, nine hundred twenty-nine thousand, nine hundred nine".