135634909 has 4 divisors (see below), whose sum is σ = 135959040. Its totient is φ = 135310780.

The previous prime is 135634907. The next prime is 135634931. The reversal of 135634909 is 909436531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135634909 - 2¹ = 135634907 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 (135634907) 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, 161437 + ... + 162274.

It is an arithmetic number, because the mean of its divisors is an integer number (33989760).

Almost surely, 2^135634909 is an apocalyptic number.

It is an amenable number.

135634909 is a deficient number, since it is larger than the sum of its proper divisors (324131).

135634909 is an equidigital number, since it uses as much as digits as its factorization.

135634909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324130.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 135634909 is about 11646.2401228894. The cubic root of 135634909 is about 513.7957333050.

The spelling of 135634909 in words is "one hundred thirty-five million, six hundred thirty-four thousand, nine hundred nine".