8021863 has 2 divisors, whose sum is σ = 8021864. Its totient is φ = 8021862.

The previous prime is 8021851. The next prime is 8021869. The reversal of 8021863 is 3681208.

8021863 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 is a cyclic number.

It is not a de Polignac number, because 8021863 - 2⁵ = 8021831 is a prime.

8021863 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8021869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4010931 + 4010932.

It is an arithmetic number, because the mean of its divisors is an integer number (4010932).

Almost surely, 2^8021863 is an apocalyptic number.

8021863 is a deficient number, since it is larger than the sum of its proper divisors (1).

8021863 is an equidigital number, since it uses as much as digits as its factorization.

8021863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 8021863 is about 2832.2893566866. The cubic root of 8021863 is about 200.1820259492.

The spelling of 8021863 in words is "eight million, twenty-one thousand, eight hundred sixty-three".