6820769 has 2 divisors, whose sum is σ = 6820770. Its totient is φ = 6820768.

The previous prime is 6820741. The next prime is 6820783. The reversal of 6820769 is 9670286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6436369 + 384400 = 2537^2 + 620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6820769 is a prime.

It is a super-2 number, since 2×6820769² = 93045779502722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6820739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410384 + 3410385.

It is an arithmetic number, because the mean of its divisors is an integer number (3410385).

Almost surely, 2^6820769 is an apocalyptic number.

It is an amenable number.

6820769 is a deficient number, since it is larger than the sum of its proper divisors (1).

6820769 is an equidigital number, since it uses as much as digits as its factorization.

6820769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 6820769 is about 2611.6601999494. The cubic root of 6820769 is about 189.6463319299.

The spelling of 6820769 in words is "six million, eight hundred twenty thousand, seven hundred sixty-nine".