504747809 has 2 divisors, whose sum is σ = 504747810. Its totient is φ = 504747808.

The previous prime is 504747791. The next prime is 504747829. The reversal of 504747809 is 908747405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362064784 + 142683025 = 19028^2 + 11945^2 .

It is a cyclic number.

It is not a de Polignac number, because 504747809 - 2⁸ = 504747553 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 504747809.

It is not a weakly prime, because it can be changed into another prime (504747829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252373904 + 252373905.

It is an arithmetic number, because the mean of its divisors is an integer number (252373905).

Almost surely, 2^504747809 is an apocalyptic number.

It is an amenable number.

504747809 is a deficient number, since it is larger than the sum of its proper divisors (1).

504747809 is an equidigital number, since it uses as much as digits as its factorization.

504747809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 504747809 is about 22466.5931774268. The cubic root of 504747809 is about 796.2048416237.

The spelling of 504747809 in words is "five hundred four million, seven hundred forty-seven thousand, eight hundred nine".