135408809 has 8 divisors (see below), whose sum is σ = 137634720. Its totient is φ = 133189056.

The previous prime is 135408803. The next prime is 135408811. The reversal of 135408809 is 908804531.

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 135408809 - 2¹² = 135404713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135408803) 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, 66602 + ... + 68604.

It is an arithmetic number, because the mean of its divisors is an integer number (17204340).

Almost surely, 2^135408809 is an apocalyptic number.

It is an amenable number.

135408809 is a deficient number, since it is larger than the sum of its proper divisors (2225911).

135408809 is a wasteful number, since it uses less digits than its factorization.

135408809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 135408809 is about 11636.5290787245. The cubic root of 135408809 is about 513.5100796426.

The spelling of 135408809 in words is "one hundred thirty-five million, four hundred eight thousand, eight hundred nine".