6820339 has 2 divisors, whose sum is σ = 6820340. Its totient is φ = 6820338.

The previous prime is 6820291. The next prime is 6820367. The reversal of 6820339 is 9330286.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6820339 - 2⁷ = 6820211 is a prime.

6820339 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6820339.

It is not a weakly prime, because it can be changed into another prime (6820369) 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, 3410169 + 3410170.

It is an arithmetic number, because the mean of its divisors is an integer number (3410170).

Almost surely, 2^6820339 is an apocalyptic number.

6820339 is a deficient number, since it is larger than the sum of its proper divisors (1).

6820339 is an equidigital number, since it uses as much as digits as its factorization.

6820339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 6820339 is about 2611.5778755381. The cubic root of 6820339 is about 189.6423465710.

The spelling of 6820339 in words is "six million, eight hundred twenty thousand, three hundred thirty-nine".