6820039 has 2 divisors, whose sum is σ = 6820040. Its totient is φ = 6820038.

The previous prime is 6820019. The next prime is 6820057. The reversal of 6820039 is 9300286.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6820039 - 2⁵ = 6820007 is a prime.

6820039 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6819989 and 6820016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6820019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410019 + 3410020.

It is an arithmetic number, because the mean of its divisors is an integer number (3410020).

Almost surely, 2^6820039 is an apocalyptic number.

6820039 is a deficient number, since it is larger than the sum of its proper divisors (1).

6820039 is an equidigital number, since it uses as much as digits as its factorization.

6820039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 6820039 is about 2611.5204383654. The cubic root of 6820039 is about 189.6395659889.

The spelling of 6820039 in words is "six million, eight hundred twenty thousand, thirty-nine".