136809311 has 2 divisors, whose sum is σ = 136809312. Its totient is φ = 136809310.

The previous prime is 136809241. The next prime is 136809341. The reversal of 136809311 is 113908631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136809311 - 2²⁶ = 69700447 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136809341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68404655 + 68404656.

It is an arithmetic number, because the mean of its divisors is an integer number (68404656).

Almost surely, 2^136809311 is an apocalyptic number.

136809311 is a deficient number, since it is larger than the sum of its proper divisors (1).

136809311 is an equidigital number, since it uses as much as digits as its factorization.

136809311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 136809311 is about 11696.5512438496. The cubic root of 136809311 is about 515.2743829610.

The spelling of 136809311 in words is "one hundred thirty-six million, eight hundred nine thousand, three hundred eleven".