136666319 has 2 divisors, whose sum is σ = 136666320. Its totient is φ = 136666318.

The previous prime is 136666289. The next prime is 136666333. The reversal of 136666319 is 913666631.

136666319 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 an emirp because it is prime and its reverse (913666631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136666319 - 2¹² = 136662223 is a prime.

It is a super-2 number, since 2×136666319² = 37355365498019522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136666339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68333159 + 68333160.

It is an arithmetic number, because the mean of its divisors is an integer number (68333160).

Almost surely, 2^136666319 is an apocalyptic number.

136666319 is a deficient number, since it is larger than the sum of its proper divisors (1).

136666319 is an equidigital number, since it uses as much as digits as its factorization.

136666319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 41.

The square root of 136666319 is about 11690.4370748061. The cubic root of 136666319 is about 515.0948001560.

The spelling of 136666319 in words is "one hundred thirty-six million, six hundred sixty-six thousand, three hundred nineteen".