136220489 has 2 divisors, whose sum is σ = 136220490. Its totient is φ = 136220488.

The previous prime is 136220437. The next prime is 136220527. The reversal of 136220489 is 984022631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75255625 + 60964864 = 8675^2 + 7808^2 .

It is an emirp because it is prime and its reverse (984022631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136220489 - 2⁸ = 136220233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (136220389) 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, 68110244 + 68110245.

It is an arithmetic number, because the mean of its divisors is an integer number (68110245).

Almost surely, 2^136220489 is an apocalyptic number.

It is an amenable number.

136220489 is a deficient number, since it is larger than the sum of its proper divisors (1).

136220489 is an equidigital number, since it uses as much as digits as its factorization.

136220489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 136220489 is about 11671.3533491194. The cubic root of 136220489 is about 514.5340795043.

The spelling of 136220489 in words is "one hundred thirty-six million, two hundred twenty thousand, four hundred eighty-nine".