136736209 has 2 divisors, whose sum is σ = 136736210. Its totient is φ = 136736208.

The previous prime is 136736203. The next prime is 136736221. The reversal of 136736209 is 902637631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68425984 + 68310225 = 8272^2 + 8265^2 .

It is a cyclic number.

It is not a de Polignac number, because 136736209 - 2⁵ = 136736177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136736203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68368104 + 68368105.

It is an arithmetic number, because the mean of its divisors is an integer number (68368105).

Almost surely, 2^136736209 is an apocalyptic number.

It is an amenable number.

136736209 is a deficient number, since it is larger than the sum of its proper divisors (1).

136736209 is an equidigital number, since it uses as much as digits as its factorization.

136736209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 136736209 is about 11693.4258880792. The cubic root of 136736209 is about 515.1825902345.

The spelling of 136736209 in words is "one hundred thirty-six million, seven hundred thirty-six thousand, two hundred nine".