135411209 has 2 divisors, whose sum is σ = 135411210. Its totient is φ = 135411208.

The previous prime is 135411197. The next prime is 135411251. The reversal of 135411209 is 902114531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124255609 + 11155600 = 11147^2 + 3340^2 .

It is a cyclic number.

It is not a de Polignac number, because 135411209 - 2²⁰ = 134362633 is a prime.

It is not a weakly prime, because it can be changed into another prime (135416209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67705604 + 67705605.

It is an arithmetic number, because the mean of its divisors is an integer number (67705605).

Almost surely, 2^135411209 is an apocalyptic number.

It is an amenable number.

135411209 is a deficient number, since it is larger than the sum of its proper divisors (1).

135411209 is an equidigital number, since it uses as much as digits as its factorization.

135411209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 135411209 is about 11636.6322018013. The cubic root of 135411209 is about 513.5131134602.

The spelling of 135411209 in words is "one hundred thirty-five million, four hundred eleven thousand, two hundred nine".