809219336 has 8 divisors (see below), whose sum is σ = 1517286270. Its totient is φ = 404609664.

The previous prime is 809219303. The next prime is 809219339. The reversal of 809219336 is 633912908.

It can be written as a sum of positive squares in only one way, i.e., 789947236 + 19272100 = 28106^2 + 4390^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 809219293 and 809219302.

It is not an unprimeable number, because it can be changed into a prime (809219339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50576201 + ... + 50576216.

Almost surely, 2^809219336 is an apocalyptic number.

It is an amenable number.

809219336 is a deficient number, since it is larger than the sum of its proper divisors (708066934).

809219336 is a wasteful number, since it uses less digits than its factorization.

809219336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101152423 (or 101152419 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 809219336 is about 28446.7807668987. The cubic root of 809219336 is about 931.8701858283.

The spelling of 809219336 in words is "eight hundred nine million, two hundred nineteen thousand, three hundred thirty-six".