6820994 has 16 divisors (see below), whose sum is σ = 10507320. Its totient is φ = 3319680.

The previous prime is 6820993. The next prime is 6820999. The reversal of 6820994 is 4990286.

It can be written as a sum of positive squares in 4 ways, for example, as 6786025 + 34969 = 2605^2 + 187^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6820991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24134 + ... + 24414.

Almost surely, 2^6820994 is an apocalyptic number.

6820994 is a deficient number, since it is larger than the sum of its proper divisors (3686326).

6820994 is a wasteful number, since it uses less digits than its factorization.

6820994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 6820994 is about 2611.7032756422. The cubic root of 6820994 is about 189.6484172253.

The spelling of 6820994 in words is "six million, eight hundred twenty thousand, nine hundred ninety-four".