9866687 has 2 divisors, whose sum is σ = 9866688. Its totient is φ = 9866686.

The previous prime is 9866683. The next prime is 9866693. The reversal of 9866687 is 7866689.

It is a weak prime.

It is an emirp because it is prime and its reverse (7866689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9866687 - 2² = 9866683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9866683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4933343 + 4933344.

It is an arithmetic number, because the mean of its divisors is an integer number (4933344).

Almost surely, 2^9866687 is an apocalyptic number.

9866687 is a deficient number, since it is larger than the sum of its proper divisors (1).

9866687 is an equidigital number, since it uses as much as digits as its factorization.

9866687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 50.

The square root of 9866687 is about 3141.1283004678. The cubic root of 9866687 is about 214.4818023296.

The spelling of 9866687 in words is "nine million, eight hundred sixty-six thousand, six hundred eighty-seven".