8232821 has 2 divisors, whose sum is σ = 8232822. Its totient is φ = 8232820.

The previous prime is 8232817. The next prime is 8232857. The reversal of 8232821 is 1282328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8151025 + 81796 = 2855^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 8232821 - 2² = 8232817 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8232881) 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, 4116410 + 4116411.

It is an arithmetic number, because the mean of its divisors is an integer number (4116411).

Almost surely, 2^8232821 is an apocalyptic number.

It is an amenable number.

8232821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8232821 is an equidigital number, since it uses as much as digits as its factorization.

8232821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 26.

The square root of 8232821 is about 2869.2892848230. The cubic root of 8232821 is about 201.9216521307.

The spelling of 8232821 in words is "eight million, two hundred thirty-two thousand, eight hundred twenty-one".