136322561 has 2 divisors, whose sum is σ = 136322562. Its totient is φ = 136322560.

The previous prime is 136322521. The next prime is 136322567. The reversal of 136322561 is 165223631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97634161 + 38688400 = 9881^2 + 6220^2 .

It is a cyclic number.

It is not a de Polignac number, because 136322561 - 2⁶ = 136322497 is a prime.

It is not a weakly prime, because it can be changed into another prime (136322567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68161280 + 68161281.

It is an arithmetic number, because the mean of its divisors is an integer number (68161281).

Almost surely, 2^136322561 is an apocalyptic number.

It is an amenable number.

136322561 is a deficient number, since it is larger than the sum of its proper divisors (1).

136322561 is an equidigital number, since it uses as much as digits as its factorization.

136322561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

The square root of 136322561 is about 11675.7252879639. The cubic root of 136322561 is about 514.6625633825.

The spelling of 136322561 in words is "one hundred thirty-six million, three hundred twenty-two thousand, five hundred sixty-one".