8643287 has 2 divisors, whose sum is σ = 8643288. Its totient is φ = 8643286.

The previous prime is 8643281. The next prime is 8643307. The reversal of 8643287 is 7823468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8643287 - 2⁶ = 8643223 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8643287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8643281) 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, 4321643 + 4321644.

It is an arithmetic number, because the mean of its divisors is an integer number (4321644).

Almost surely, 2^8643287 is an apocalyptic number.

8643287 is a deficient number, since it is larger than the sum of its proper divisors (1).

8643287 is an equidigital number, since it uses as much as digits as its factorization.

8643287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 38.

The square root of 8643287 is about 2939.9467682256. The cubic root of 8643287 is about 205.2231320193.

The spelling of 8643287 in words is "eight million, six hundred forty-three thousand, two hundred eighty-seven".