9045809 has 2 divisors, whose sum is σ = 9045810. Its totient is φ = 9045808.

The previous prime is 9045779. The next prime is 9045811. The reversal of 9045809 is 9085409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5895184 + 3150625 = 2428^2 + 1775^2 .

It is an emirp because it is prime and its reverse (9085409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9045809 - 2¹² = 9041713 is a prime.

Together with 9045811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9045859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4522904 + 4522905.

It is an arithmetic number, because the mean of its divisors is an integer number (4522905).

Almost surely, 2^9045809 is an apocalyptic number.

It is an amenable number.

9045809 is a deficient number, since it is larger than the sum of its proper divisors (1).

9045809 is an equidigital number, since it uses as much as digits as its factorization.

9045809 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 35.

The square root of 9045809 is about 3007.6251428660. The cubic root of 9045809 is about 208.3606984143.

The spelling of 9045809 in words is "nine million, forty-five thousand, eight hundred nine".