7982209 has 2 divisors, whose sum is σ = 7982210. Its totient is φ = 7982208.

The previous prime is 7982203. The next prime is 7982237. The reversal of 7982209 is 9022897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7441984 + 540225 = 2728^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 7982209 - 2³ = 7982201 is a prime.

It is a Chen prime.

7982209 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7982201) 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 as a sum of consecutive naturals, namely, 3991104 + 3991105.

It is an arithmetic number, because the mean of its divisors is an integer number (3991105).

Almost surely, 2^7982209 is an apocalyptic number.

It is an amenable number.

7982209 is a deficient number, since it is larger than the sum of its proper divisors (1).

7982209 is an equidigital number, since it uses as much as digits as its factorization.

7982209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 7982209 is about 2825.2803400725. The cubic root of 7982209 is about 199.8516316280.

The spelling of 7982209 in words is "seven million, nine hundred eighty-two thousand, two hundred nine".