2745866209 has 2 divisors, whose sum is σ = 2745866210. Its totient is φ = 2745866208.

The previous prime is 2745866177. The next prime is 2745866219. The reversal of 2745866209 is 9026685472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2734976209 + 10890000 = 52297^2 + 3300^2 .

It is a cyclic number.

It is not a de Polignac number, because 2745866209 - 2⁵ = 2745866177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2745866219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1372933104 + 1372933105.

It is an arithmetic number, because the mean of its divisors is an integer number (1372933105).

Almost surely, 2^2745866209 is an apocalyptic number.

It is an amenable number.

2745866209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2745866209 is an equidigital number, since it uses as much as digits as its factorization.

2745866209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 2745866209 is about 52401.0134348564. The cubic root of 2745866209 is about 1400.3173105590.

The spelling of 2745866209 in words is "two billion, seven hundred forty-five million, eight hundred sixty-six thousand, two hundred nine".