8640287 has 2 divisors, whose sum is σ = 8640288. Its totient is φ = 8640286.

The previous prime is 8640263. The next prime is 8640329. The reversal of 8640287 is 7820468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8640287 - 2¹⁰ = 8639263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8640187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4320143 + 4320144.

It is an arithmetic number, because the mean of its divisors is an integer number (4320144).

Almost surely, 2^8640287 is an apocalyptic number.

8640287 is a deficient number, since it is larger than the sum of its proper divisors (1).

8640287 is an equidigital number, since it uses as much as digits as its factorization.

8640287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 8640287 is about 2939.4365106258. The cubic root of 8640287 is about 205.1993856274.

The spelling of 8640287 in words is "eight million, six hundred forty thousand, two hundred eighty-seven".