804918563 has 2 divisors, whose sum is σ = 804918564. Its totient is φ = 804918562.

The previous prime is 804918553. The next prime is 804918571. The reversal of 804918563 is 365819408.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 804918563 - 2⁴ = 804918547 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (804918523) 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, 402459281 + 402459282.

It is an arithmetic number, because the mean of its divisors is an integer number (402459282).

Almost surely, 2^804918563 is an apocalyptic number.

804918563 is a deficient number, since it is larger than the sum of its proper divisors (1).

804918563 is an equidigital number, since it uses as much as digits as its factorization.

804918563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 804918563 is about 28371.0867433731. The cubic root of 804918563 is about 930.2163766005.

The spelling of 804918563 in words is "eight hundred four million, nine hundred eighteen thousand, five hundred sixty-three".