136079809 has 2 divisors, whose sum is σ = 136079810. Its totient is φ = 136079808.

The previous prime is 136079761. The next prime is 136079857. The reversal of 136079809 is 908970631.

It is a balanced prime because it is at equal distance from previous prime (136079761) and next prime (136079857).

It can be written as a sum of positive squares in only one way, i.e., 128323584 + 7756225 = 11328^2 + 2785^2 .

It is a cyclic number.

It is not a de Polignac number, because 136079809 - 2⁷ = 136079681 is a prime.

It is not a weakly prime, because it can be changed into another prime (136019809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68039904 + 68039905.

It is an arithmetic number, because the mean of its divisors is an integer number (68039905).

Almost surely, 2^136079809 is an apocalyptic number.

It is an amenable number.

136079809 is a deficient number, since it is larger than the sum of its proper divisors (1).

136079809 is an equidigital number, since it uses as much as digits as its factorization.

136079809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 136079809 is about 11665.3250704813. The cubic root of 136079809 is about 514.3568922905.

The spelling of 136079809 in words is "one hundred thirty-six million, seventy-nine thousand, eight hundred nine".