804263209 has 2 divisors, whose sum is σ = 804263210. Its totient is φ = 804263208.

The previous prime is 804263189. The next prime is 804263233. The reversal of 804263209 is 902362408.

804263209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 664195984 + 140067225 = 25772^2 + 11835^2 .

It is a cyclic number.

It is not a de Polignac number, because 804263209 - 2²⁹ = 267392297 is a prime.

It is not a weakly prime, because it can be changed into another prime (804263249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402131604 + 402131605.

It is an arithmetic number, because the mean of its divisors is an integer number (402131605).

Almost surely, 2^804263209 is an apocalyptic number.

It is an amenable number.

804263209 is a deficient number, since it is larger than the sum of its proper divisors (1).

804263209 is an equidigital number, since it uses as much as digits as its factorization.

804263209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 804263209 is about 28359.5347105696. The cubic root of 804263209 is about 929.9638514488.

The spelling of 804263209 in words is "eight hundred four million, two hundred sixty-three thousand, two hundred nine".