9864986 has 4 divisors (see below), whose sum is σ = 14797482. Its totient is φ = 4932492.

The previous prime is 9864983. The next prime is 9864989. The reversal of 9864986 is 6894689.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6894689 = 977 ⋅7057.

It is an interprime number because it is at equal distance from previous prime (9864983) and next prime (9864989).

It can be written as a sum of positive squares in only one way, i.e., 7946761 + 1918225 = 2819^2 + 1385^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9864983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2466245 + ... + 2466248.

Almost surely, 2^9864986 is an apocalyptic number.

9864986 is a deficient number, since it is larger than the sum of its proper divisors (4932496).

9864986 is a wasteful number, since it uses less digits than its factorization.

9864986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932495.

The product of its digits is 746496, while the sum is 50.

The square root of 9864986 is about 3140.8575262180. The cubic root of 9864986 is about 214.4694761890.

The spelling of 9864986 in words is "nine million, eight hundred sixty-four thousand, nine hundred eighty-six".