8204004209 has 4 divisors (see below), whose sum is σ = 8211350004. Its totient is φ = 8196658416.

The previous prime is 8204004199. The next prime is 8204004217. The reversal of 8204004209 is 9024004028.

8204004209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2088764209 + 6115240000 = 45703^2 + 78200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8204004209 is a prime.

It is a super-2 number, since 2×8204004209² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8204004239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3671222 + ... + 3673455.

It is an arithmetic number, because the mean of its divisors is an integer number (2052837501).

Almost surely, 2^8204004209 is an apocalyptic number.

It is an amenable number.

8204004209 is a deficient number, since it is larger than the sum of its proper divisors (7345795).

8204004209 is a wasteful number, since it uses less digits than its factorization.

8204004209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7345794.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 8204004209 is about 90575.9582284394. The cubic root of 8204004209 is about 2016.8578578321.

The spelling of 8204004209 in words is "eight billion, two hundred four million, four thousand, two hundred nine".