6820711 has 2 divisors, whose sum is σ = 6820712. Its totient is φ = 6820710.

The previous prime is 6820663. The next prime is 6820721. The reversal of 6820711 is 1170286.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6820711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6820721) 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, 3410355 + 3410356.

It is an arithmetic number, because the mean of its divisors is an integer number (3410356).

Almost surely, 2^6820711 is an apocalyptic number.

6820711 is a deficient number, since it is larger than the sum of its proper divisors (1).

6820711 is an equidigital number, since it uses as much as digits as its factorization.

6820711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 6820711 is about 2611.6490958779. The cubic root of 6820711 is about 189.6457943796.

Adding to 6820711 its reverse (1170286), we get a palindrome (7990997).

The spelling of 6820711 in words is "six million, eight hundred twenty thousand, seven hundred eleven".