6797821 has 2 divisors, whose sum is σ = 6797822. Its totient is φ = 6797820.

The previous prime is 6797809. The next prime is 6797849. The reversal of 6797821 is 1287976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4202500 + 2595321 = 2050^2 + 1611^2 .

It is a cyclic number.

It is not a de Polignac number, because 6797821 - 2¹⁷ = 6666749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6797891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3398910 + 3398911.

It is an arithmetic number, because the mean of its divisors is an integer number (3398911).

Almost surely, 2^6797821 is an apocalyptic number.

It is an amenable number.

6797821 is a deficient number, since it is larger than the sum of its proper divisors (1).

6797821 is an equidigital number, since it uses as much as digits as its factorization.

6797821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 6797821 is about 2607.2631244276. The cubic root of 6797821 is about 189.4334090254.

The spelling of 6797821 in words is "six million, seven hundred ninety-seven thousand, eight hundred twenty-one".