8195209 has 12 divisors (see below), whose sum is σ = 9121140. Its totient is φ = 7356800.

The previous prime is 8195189. The next prime is 8195227. The reversal of 8195209 is 9025918.

It can be written as a sum of positive squares in 2 ways, for example, as 511225 + 7683984 = 715^2 + 2772^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8195209 is a prime.

It is a super-2 number, since 2×8195209² = 134322901107362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8195269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10389 + ... + 11149.

It is an arithmetic number, because the mean of its divisors is an integer number (760095).

Almost surely, 2^8195209 is an apocalyptic number.

8195209 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

8195209 is a deficient number, since it is larger than the sum of its proper divisors (925931).

8195209 is a wasteful number, since it uses less digits than its factorization.

8195209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 8195209 is about 2862.7275455411. The cubic root of 8195209 is about 201.6136867256.

The spelling of 8195209 in words is "eight million, one hundred ninety-five thousand, two hundred nine".