9912985 has 16 divisors (see below), whose sum is σ = 12220416. Its totient is φ = 7717248.

The previous prime is 9912979. The next prime is 9913027. The reversal of 9912985 is 5892199.

It is a cyclic number.

It is not a de Polignac number, because 9912985 - 2¹³ = 9904793 is a prime.

It is a super-2 number, since 2×9912985² = 196534543220450, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (58320) is a multiple of the sum of its prime divisors (432).

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, 42429 + ... + 42661.

It is an arithmetic number, because the mean of its divisors is an integer number (763776).

Almost surely, 2^9912985 is an apocalyptic number.

It is an amenable number.

9912985 is a deficient number, since it is larger than the sum of its proper divisors (2307431).

9912985 is a wasteful number, since it uses less digits than its factorization.

9912985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432.

The product of its digits is 58320, while the sum is 43.

The square root of 9912985 is about 3148.4893202931. The cubic root of 9912985 is about 214.8167539038.

The spelling of 9912985 in words is "nine million, nine hundred twelve thousand, nine hundred eighty-five".