804494809 has 2 divisors, whose sum is σ = 804494810. Its totient is φ = 804494808.

The previous prime is 804494777. The next prime is 804494819. The reversal of 804494809 is 908494408.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 804289600 + 205209 = 28360^2 + 453^2 .

It is a cyclic number.

It is not a de Polignac number, because 804494809 - 2⁵ = 804494777 is a prime.

It is not a weakly prime, because it can be changed into another prime (804494819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402247404 + 402247405.

It is an arithmetic number, because the mean of its divisors is an integer number (402247405).

Almost surely, 2^804494809 is an apocalyptic number.

It is an amenable number.

804494809 is a deficient number, since it is larger than the sum of its proper divisors (1).

804494809 is an equidigital number, since it uses as much as digits as its factorization.

804494809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 804494809 is about 28363.6176994402. The cubic root of 804494809 is about 930.0531086949.

It can be divided in two parts, 80449 and 4809, that added together give a palindrome (85258).

The spelling of 804494809 in words is "eight hundred four million, four hundred ninety-four thousand, eight hundred nine".