136220549 has 2 divisors, whose sum is σ = 136220550. Its totient is φ = 136220548.

The previous prime is 136220543. The next prime is 136220561. The reversal of 136220549 is 945022631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130119649 + 6100900 = 11407^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 136220549 - 2⁴ = 136220533 is a prime.

It is a super-2 number, since 2×136220549² = 37112075939722802, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136220543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68110274 + 68110275.

It is an arithmetic number, because the mean of its divisors is an integer number (68110275).

Almost surely, 2^136220549 is an apocalyptic number.

It is an amenable number.

136220549 is a deficient number, since it is larger than the sum of its proper divisors (1).

136220549 is an equidigital number, since it uses as much as digits as its factorization.

136220549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 136220549 is about 11671.3559195151. The cubic root of 136220549 is about 514.5341550486.

The spelling of 136220549 in words is "one hundred thirty-six million, two hundred twenty thousand, five hundred forty-nine".