9867985 has 4 divisors (see below), whose sum is σ = 11841588. Its totient is φ = 7894384.

The previous prime is 9867971. The next prime is 9868009. The reversal of 9867985 is 5897689.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4112784 + 5755201 = 2028^2 + 2399^2 .

It is a cyclic number.

It is not a de Polignac number, because 9867985 - 2¹¹ = 9865937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 986794 + ... + 986803.

It is an arithmetic number, because the mean of its divisors is an integer number (2960397).

Almost surely, 2^9867985 is an apocalyptic number.

It is an amenable number.

9867985 is a deficient number, since it is larger than the sum of its proper divisors (1973603).

9867985 is a wasteful number, since it uses less digits than its factorization.

9867985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973602.

The product of its digits is 1088640, while the sum is 52.

The square root of 9867985 is about 3141.3349073284. The cubic root of 9867985 is about 214.4912072147.

The spelling of 9867985 in words is "nine million, eight hundred sixty-seven thousand, nine hundred eighty-five".