136688087 has 2 divisors, whose sum is σ = 136688088. Its totient is φ = 136688086.

The previous prime is 136688081. The next prime is 136688089. The reversal of 136688087 is 780886631.

136688087 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136688087 is a prime.

Together with 136688089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136688081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68344043 + 68344044.

It is an arithmetic number, because the mean of its divisors is an integer number (68344044).

Almost surely, 2^136688087 is an apocalyptic number.

136688087 is a deficient number, since it is larger than the sum of its proper divisors (1).

136688087 is an equidigital number, since it uses as much as digits as its factorization.

136688087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 136688087 is about 11691.3680551080. The cubic root of 136688087 is about 515.1221465386.

The spelling of 136688087 in words is "one hundred thirty-six million, six hundred eighty-eight thousand, eighty-seven".