135703809 has 32 divisors (see below), whose sum is σ = 218090880. Its totient is φ = 83059200.

The previous prime is 135703807. The next prime is 135703823. The reversal of 135703809 is 908307531.

135703809 is a `hidden beast` number, since 1 + 3 + 570 + 3 + 80 + 9 = 666.

It is not a de Polignac number, because 135703809 - 2¹ = 135703807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135703807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15214 + ... + 22424.

It is an arithmetic number, because the mean of its divisors is an integer number (6815340).

Almost surely, 2^135703809 is an apocalyptic number.

It is an amenable number.

135703809 is a deficient number, since it is larger than the sum of its proper divisors (82387071).

135703809 is a wasteful number, since it uses less digits than its factorization.

135703809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7278 (or 7272 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 135703809 is about 11649.1977835386. The cubic root of 135703809 is about 513.8827181226.

The spelling of 135703809 in words is "one hundred thirty-five million, seven hundred three thousand, eight hundred nine".