7682809 has 2 divisors, whose sum is σ = 7682810. Its totient is φ = 7682808.

The previous prime is 7682789. The next prime is 7682813. The reversal of 7682809 is 9082867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6250000 + 1432809 = 2500^2 + 1197^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7682809 is a prime.

It is a Chen prime.

7682809 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7682819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3841404 + 3841405.

It is an arithmetic number, because the mean of its divisors is an integer number (3841405).

Almost surely, 2^7682809 is an apocalyptic number.

It is an amenable number.

7682809 is a deficient number, since it is larger than the sum of its proper divisors (1).

7682809 is an equidigital number, since it uses as much as digits as its factorization.

7682809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 7682809 is about 2771.7880510602. The cubic root of 7682809 is about 197.3210171454.

The spelling of 7682809 in words is "seven million, six hundred eighty-two thousand, eight hundred nine".