136663609 has 2 divisors, whose sum is σ = 136663610. Its totient is φ = 136663608.

The previous prime is 136663577. The next prime is 136663621. The reversal of 136663609 is 906366631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99940009 + 36723600 = 9997^2 + 6060^2 .

It is a cyclic number.

It is not a de Polignac number, because 136663609 - 2⁵ = 136663577 is a prime.

It is not a weakly prime, because it can be changed into another prime (136663679) 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, 68331804 + 68331805.

It is an arithmetic number, because the mean of its divisors is an integer number (68331805).

Almost surely, 2^136663609 is an apocalyptic number.

It is an amenable number.

136663609 is a deficient number, since it is larger than the sum of its proper divisors (1).

136663609 is an equidigital number, since it uses as much as digits as its factorization.

136663609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 136663609 is about 11690.3211675300. The cubic root of 136663609 is about 515.0913954738.

The spelling of 136663609 in words is "one hundred thirty-six million, six hundred sixty-three thousand, six hundred nine".