135092609 has 4 divisors (see below), whose sum is σ = 135161604. Its totient is φ = 135023616.

The previous prime is 135092563. The next prime is 135092611. The reversal of 135092609 is 906290531.

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 50452609 + 84640000 = 7103^2 + 9200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135092609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135092669) 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, 31472 + ... + 35505.

It is an arithmetic number, because the mean of its divisors is an integer number (33790401).

Almost surely, 2^135092609 is an apocalyptic number.

It is an amenable number.

135092609 is a deficient number, since it is larger than the sum of its proper divisors (68995).

135092609 is an equidigital number, since it uses as much as digits as its factorization.

135092609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68994.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 135092609 is about 11622.9346122225. The cubic root of 135092609 is about 513.1100602735.

The spelling of 135092609 in words is "one hundred thirty-five million, ninety-two thousand, six hundred nine".