8222009 has 2 divisors, whose sum is σ = 8222010. Its totient is φ = 8222008.

The previous prime is 8221991. The next prime is 8222047. The reversal of 8222009 is 9002228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4963984 + 3258025 = 2228^2 + 1805^2 .

It is a cyclic number.

It is not a de Polignac number, because 8222009 - 2⁸ = 8221753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8222059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4111004 + 4111005.

It is an arithmetic number, because the mean of its divisors is an integer number (4111005).

Almost surely, 2^8222009 is an apocalyptic number.

It is an amenable number.

8222009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8222009 is an equidigital number, since it uses as much as digits as its factorization.

8222009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 8222009 is about 2867.4045755700. The cubic root of 8222009 is about 201.8332201781.

The spelling of 8222009 in words is "eight million, two hundred twenty-two thousand, nine".