135241609 has 2 divisors, whose sum is σ = 135241610. Its totient is φ = 135241608.

The previous prime is 135241591. The next prime is 135241643. The reversal of 135241609 is 906142531.

135241609 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., 125507209 + 9734400 = 11203^2 + 3120^2 .

It is a cyclic number.

It is not a de Polignac number, because 135241609 - 2¹¹ = 135239561 is a prime.

It is not a weakly prime, because it can be changed into another prime (135241669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67620804 + 67620805.

It is an arithmetic number, because the mean of its divisors is an integer number (67620805).

Almost surely, 2^135241609 is an apocalyptic number.

It is an amenable number.

135241609 is a deficient number, since it is larger than the sum of its proper divisors (1).

135241609 is an equidigital number, since it uses as much as digits as its factorization.

135241609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 135241609 is about 11629.3425867501. The cubic root of 135241609 is about 513.2986353770.

The spelling of 135241609 in words is "one hundred thirty-five million, two hundred forty-one thousand, six hundred nine".