135116609 has 4 divisors (see below), whose sum is σ = 135203760. Its totient is φ = 135029460.

The previous prime is 135116603. The next prime is 135116617. The reversal of 135116609 is 906611531.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-135116609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135116603) 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, 41207 + ... + 44364.

It is an arithmetic number, because the mean of its divisors is an integer number (33800940).

Almost surely, 2^135116609 is an apocalyptic number.

It is an amenable number.

135116609 is a deficient number, since it is larger than the sum of its proper divisors (87151).

135116609 is an equidigital number, since it uses as much as digits as its factorization.

135116609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87150.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 135116609 is about 11623.9670078678. The cubic root of 135116609 is about 513.1404441520.

The spelling of 135116609 in words is "one hundred thirty-five million, one hundred sixteen thousand, six hundred nine".