136664947 has 2 divisors, whose sum is σ = 136664948. Its totient is φ = 136664946.

The previous prime is 136664917. The next prime is 136664953. The reversal of 136664947 is 749466631.

It is a happy number.

136664947 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-136664947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136664897 and 136664906.

It is not a weakly prime, because it can be changed into another prime (136664917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68332473 + 68332474.

It is an arithmetic number, because the mean of its divisors is an integer number (68332474).

Almost surely, 2^136664947 is an apocalyptic number.

136664947 is a deficient number, since it is larger than the sum of its proper divisors (1).

136664947 is an equidigital number, since it uses as much as digits as its factorization.

136664947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 46.

The square root of 136664947 is about 11690.3783942180. The cubic root of 136664947 is about 515.0930764628.

The spelling of 136664947 in words is "one hundred thirty-six million, six hundred sixty-four thousand, nine hundred forty-seven".