8099209 has 4 divisors (see below), whose sum is σ = 8182804. Its totient is φ = 8015616.

The previous prime is 8099173. The next prime is 8099219. The reversal of 8099209 is 9029908.

8099209 = 100² + 101² + ... + 293².

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 3433609 + 4665600 = 1853^2 + 2160^2 .

It is a cyclic number.

It is not a de Polignac number, because 8099209 - 2⁷ = 8099081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8099219) 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 in 3 ways as a sum of consecutive naturals, for example, 41652 + ... + 41845.

It is an arithmetic number, because the mean of its divisors is an integer number (2045701).

Almost surely, 2^8099209 is an apocalyptic number.

It is an amenable number.

8099209 is a deficient number, since it is larger than the sum of its proper divisors (83595).

8099209 is an equidigital number, since it uses as much as digits as its factorization.

8099209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83594.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 8099209 is about 2845.9109262238. The cubic root of 8099209 is about 200.8233475098.

The spelling of 8099209 in words is "eight million, ninety-nine thousand, two hundred nine".