8020643 has 2 divisors, whose sum is σ = 8020644. Its totient is φ = 8020642.

The previous prime is 8020631. The next prime is 8020669. The reversal of 8020643 is 3460208.

It is a happy number.

8020643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8020643 - 2⁸ = 8020387 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8020673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4010321 + 4010322.

It is an arithmetic number, because the mean of its divisors is an integer number (4010322).

Almost surely, 2^8020643 is an apocalyptic number.

8020643 is a deficient number, since it is larger than the sum of its proper divisors (1).

8020643 is an equidigital number, since it uses as much as digits as its factorization.

8020643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 8020643 is about 2832.0739750225. The cubic root of 8020643 is about 200.1718772487.

The spelling of 8020643 in words is "eight million, twenty thousand, six hundred forty-three".