135109609 has 2 divisors, whose sum is σ = 135109610. Its totient is φ = 135109608.

The previous prime is 135109603. The next prime is 135109633. The reversal of 135109609 is 906901531.

135109609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128323584 + 6786025 = 11328^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 135109609 - 2¹¹ = 135107561 is a prime.

It is not a weakly prime, because it can be changed into another prime (135109603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67554804 + 67554805.

It is an arithmetic number, because the mean of its divisors is an integer number (67554805).

Almost surely, 2^135109609 is an apocalyptic number.

It is an amenable number.

135109609 is a deficient number, since it is larger than the sum of its proper divisors (1).

135109609 is an equidigital number, since it uses as much as digits as its factorization.

135109609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 135109609 is about 11623.6659019433. The cubic root of 135109609 is about 513.1315825591.

The spelling of 135109609 in words is "one hundred thirty-five million, one hundred nine thousand, six hundred nine".