540066209 has 2 divisors, whose sum is σ = 540066210. Its totient is φ = 540066208.

The previous prime is 540066169. The next prime is 540066223. The reversal of 540066209 is 902660045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376942225 + 163123984 = 19415^2 + 12772^2 .

It is a cyclic number.

It is not a de Polignac number, because 540066209 - 2²⁴ = 523288993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (540066269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270033104 + 270033105.

It is an arithmetic number, because the mean of its divisors is an integer number (270033105).

Almost surely, 2^540066209 is an apocalyptic number.

It is an amenable number.

540066209 is a deficient number, since it is larger than the sum of its proper divisors (1).

540066209 is an equidigital number, since it uses as much as digits as its factorization.

540066209 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 540066209 is about 23239.3246244378. The cubic root of 540066209 is about 814.3585648917.

The spelling of 540066209 in words is "five hundred forty million, sixty-six thousand, two hundred nine".