6802170821 has 2 divisors, whose sum is σ = 6802170822. Its totient is φ = 6802170820.

The previous prime is 6802170803. The next prime is 6802170841. The reversal of 6802170821 is 1280712086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6298168321 + 504002500 = 79361^2 + 22450^2 .

It is a cyclic number.

It is not a de Polignac number, because 6802170821 - 2⁶ = 6802170757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6802170841) 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, 3401085410 + 3401085411.

It is an arithmetic number, because the mean of its divisors is an integer number (3401085411).

Almost surely, 2^6802170821 is an apocalyptic number.

It is an amenable number.

6802170821 is a deficient number, since it is larger than the sum of its proper divisors (1).

6802170821 is an equidigital number, since it uses as much as digits as its factorization.

6802170821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 6802170821 is about 82475.2739977261. The cubic root of 6802170821 is about 1894.7380558423.

The spelling of 6802170821 in words is "six billion, eight hundred two million, one hundred seventy thousand, eight hundred twenty-one".