8198009 has 2 divisors, whose sum is σ = 8198010. Its totient is φ = 8198008.

The previous prime is 8197967. The next prime is 8198011. The reversal of 8198009 is 9008918.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5508409 + 2689600 = 2347^2 + 1640^2 .

It is a cyclic number.

It is not a de Polignac number, because 8198009 - 2⁸ = 8197753 is a prime.

Together with 8198011, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8198009.

It is not a weakly prime, because it can be changed into another prime (8198059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4099004 + 4099005.

It is an arithmetic number, because the mean of its divisors is an integer number (4099005).

Almost surely, 2^8198009 is an apocalyptic number.

It is an amenable number.

8198009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8198009 is an equidigital number, since it uses as much as digits as its factorization.

8198009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 8198009 is about 2863.2165478706. The cubic root of 8198009 is about 201.6366454260.

The spelling of 8198009 in words is "eight million, one hundred ninety-eight thousand, nine".