8643443 has 2 divisors, whose sum is σ = 8643444. Its totient is φ = 8643442.

The previous prime is 8643433. The next prime is 8643457. The reversal of 8643443 is 3443468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8643443 - 2¹² = 8639347 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 (8643433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321721 + 4321722.

It is an arithmetic number, because the mean of its divisors is an integer number (4321722).

Almost surely, 2^8643443 is an apocalyptic number.

8643443 is a deficient number, since it is larger than the sum of its proper divisors (1).

8643443 is an equidigital number, since it uses as much as digits as its factorization.

8643443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 32.

The square root of 8643443 is about 2939.9732991985. The cubic root of 8643443 is about 205.2243666814.

The spelling of 8643443 in words is "eight million, six hundred forty-three thousand, four hundred forty-three".