136650209 has 2 divisors, whose sum is σ = 136650210. Its totient is φ = 136650208.

The previous prime is 136650193. The next prime is 136650247. The reversal of 136650209 is 902056631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133911184 + 2739025 = 11572^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 136650209 - 2⁴ = 136650193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136656209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68325104 + 68325105.

It is an arithmetic number, because the mean of its divisors is an integer number (68325105).

Almost surely, 2^136650209 is an apocalyptic number.

It is an amenable number.

136650209 is a deficient number, since it is larger than the sum of its proper divisors (1).

136650209 is an equidigital number, since it uses as much as digits as its factorization.

136650209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 136650209 is about 11689.7480297909. The cubic root of 136650209 is about 515.0745598525.

The spelling of 136650209 in words is "one hundred thirty-six million, six hundred fifty thousand, two hundred nine".