136452209 has 2 divisors, whose sum is σ = 136452210. Its totient is φ = 136452208.

The previous prime is 136452203. The next prime is 136452227. The reversal of 136452209 is 902254631.

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., 127057984 + 9394225 = 11272^2 + 3065^2 .

It is an emirp because it is prime and its reverse (902254631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136452209 is a prime.

It is not a weakly prime, because it can be changed into another prime (136452203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68226104 + 68226105.

It is an arithmetic number, because the mean of its divisors is an integer number (68226105).

Almost surely, 2^136452209 is an apocalyptic number.

It is an amenable number.

136452209 is a deficient number, since it is larger than the sum of its proper divisors (1).

136452209 is an equidigital number, since it uses as much as digits as its factorization.

136452209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 136452209 is about 11681.2760005061. The cubic root of 136452209 is about 514.8256663202.

The spelling of 136452209 in words is "one hundred thirty-six million, four hundred fifty-two thousand, two hundred nine".