136242089 has 2 divisors, whose sum is σ = 136242090. Its totient is φ = 136242088.

The previous prime is 136242061. The next prime is 136242109. The reversal of 136242089 is 980242631.

136242089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130873600 + 5368489 = 11440^2 + 2317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136242089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136242389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68121044 + 68121045.

It is an arithmetic number, because the mean of its divisors is an integer number (68121045).

Almost surely, 2^136242089 is an apocalyptic number.

It is an amenable number.

136242089 is a deficient number, since it is larger than the sum of its proper divisors (1).

136242089 is an equidigital number, since it uses as much as digits as its factorization.

136242089 is an evil number, because the sum of its binary digits is even.

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

The square root of 136242089 is about 11672.2786550013. The cubic root of 136242089 is about 514.5612740153.

The spelling of 136242089 in words is "one hundred thirty-six million, two hundred forty-two thousand, eighty-nine".