136688089 has 2 divisors, whose sum is σ = 136688090. Its totient is φ = 136688088.

The previous prime is 136688087. The next prime is 136688161. The reversal of 136688089 is 980886631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78623689 + 58064400 = 8867^2 + 7620^2 .

It is a cyclic number.

It is not a de Polignac number, because 136688089 - 2¹ = 136688087 is a prime.

Together with 136688087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (136688081) 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, 68344044 + 68344045.

It is an arithmetic number, because the mean of its divisors is an integer number (68344045).

Almost surely, 2^136688089 is an apocalyptic number.

It is an amenable number.

136688089 is a deficient number, since it is larger than the sum of its proper divisors (1).

136688089 is an equidigital number, since it uses as much as digits as its factorization.

136688089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 136688089 is about 11691.3681406412. The cubic root of 136688089 is about 515.1221490510.

The spelling of 136688089 in words is "one hundred thirty-six million, six hundred eighty-eight thousand, eighty-nine".