8076821 has 2 divisors, whose sum is σ = 8076822. Its totient is φ = 8076820.

The previous prime is 8076811. The next prime is 8076823. The reversal of 8076821 is 1286708.

8076821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8059921 + 16900 = 2839^2 + 130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8076821 is a prime.

Together with 8076823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8076823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4038410 + 4038411.

It is an arithmetic number, because the mean of its divisors is an integer number (4038411).

Almost surely, 2^8076821 is an apocalyptic number.

It is an amenable number.

8076821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8076821 is an equidigital number, since it uses as much as digits as its factorization.

8076821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 8076821 is about 2841.9748415494. The cubic root of 8076821 is about 200.6381367420.

The spelling of 8076821 in words is "eight million, seventy-six thousand, eight hundred twenty-one".