136727309 has 2 divisors, whose sum is σ = 136727310. Its totient is φ = 136727308.

The previous prime is 136727299. The next prime is 136727351. The reversal of 136727309 is 903727631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81180100 + 55547209 = 9010^2 + 7453^2 .

It is a cyclic number.

It is not a de Polignac number, because 136727309 - 2⁸ = 136727053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136727399) 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, 68363654 + 68363655.

It is an arithmetic number, because the mean of its divisors is an integer number (68363655).

Almost surely, 2^136727309 is an apocalyptic number.

It is an amenable number.

136727309 is a deficient number, since it is larger than the sum of its proper divisors (1).

136727309 is an equidigital number, since it uses as much as digits as its factorization.

136727309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 38.

The square root of 136727309 is about 11693.0453261757. The cubic root of 136727309 is about 515.1714124478.

The spelling of 136727309 in words is "one hundred thirty-six million, seven hundred twenty-seven thousand, three hundred nine".