8643223 has 2 divisors, whose sum is σ = 8643224. Its totient is φ = 8643222.

The previous prime is 8643211. The next prime is 8643281. The reversal of 8643223 is 3223468.

8643223 is digitally balanced in base 2, 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 a de Polignac number, because none of the positive numbers 2^k-8643223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8643191 and 8643200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8643023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321611 + 4321612.

It is an arithmetic number, because the mean of its divisors is an integer number (4321612).

Almost surely, 2^8643223 is an apocalyptic number.

8643223 is a deficient number, since it is larger than the sum of its proper divisors (1).

8643223 is an equidigital number, since it uses as much as digits as its factorization.

8643223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 28.

The square root of 8643223 is about 2939.9358836546. The cubic root of 8643223 is about 205.2226254870. Note that the first 3 decimals are identical.

The spelling of 8643223 in words is "eight million, six hundred forty-three thousand, two hundred twenty-three".