9996985 has 16 divisors (see below), whose sum is σ = 12387600. Its totient is φ = 7741440.

The previous prime is 9996979. The next prime is 9996991. The reversal of 9996985 is 5896999.

It is an interprime number because it is at equal distance from previous prime (9996979) and next prime (9996991).

It can be written as a sum of positive squares in 8 ways, for example, as 779689 + 9217296 = 883^2 + 3036^2 .

It is not a de Polignac number, because 9996985 - 2¹³ = 9988793 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 22041 + ... + 22489.

It is an arithmetic number, because the mean of its divisors is an integer number (774225).

Almost surely, 2^9996985 is an apocalyptic number.

It is an amenable number.

9996985 is a deficient number, since it is larger than the sum of its proper divisors (2390615).

9996985 is a wasteful number, since it uses less digits than its factorization.

9996985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588.

The product of its digits is 1574640, while the sum is 55.

The square root of 9996985 is about 3161.8009108734. The cubic root of 9996985 is about 215.4218147582.

The spelling of 9996985 in words is "nine million, nine hundred ninety-six thousand, nine hundred eighty-five".