136258909 has 2 divisors, whose sum is σ = 136258910. Its totient is φ = 136258908.

The previous prime is 136258853. The next prime is 136258939. The reversal of 136258909 is 909852631.

It is a happy number.

136258909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81054009 + 55204900 = 9003^2 + 7430^2 .

It is a cyclic number.

It is not a de Polignac number, because 136258909 - 2²¹ = 134161757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136258939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68129454 + 68129455.

It is an arithmetic number, because the mean of its divisors is an integer number (68129455).

Almost surely, 2^136258909 is an apocalyptic number.

It is an amenable number.

136258909 is a deficient number, since it is larger than the sum of its proper divisors (1).

136258909 is an equidigital number, since it uses as much as digits as its factorization.

136258909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 136258909 is about 11672.9991433222. Note that the first 3 decimals coincide. The cubic root of 136258909 is about 514.5824484911.

The spelling of 136258909 in words is "one hundred thirty-six million, two hundred fifty-eight thousand, nine hundred nine".