9998985 has 8 divisors (see below), whose sum is σ = 15998400. Its totient is φ = 5332784.

The previous prime is 9998977. The next prime is 9999047. The reversal of 9998985 is 5898999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9998985 - 2³ = 9998977 is a prime.

9998985 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333285 + ... + 333314.

It is an arithmetic number, because the mean of its divisors is an integer number (1999800).

Almost surely, 2^9998985 is an apocalyptic number.

It is an amenable number.

9998985 is a deficient number, since it is larger than the sum of its proper divisors (5999415).

9998985 is a wasteful number, since it uses less digits than its factorization.

9998985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666607.

The product of its digits is 2099520, while the sum is 57.

The square root of 9998985 is about 3162.1171705046. The cubic root of 9998985 is about 215.4361795859.

The spelling of 9998985 in words is "nine million, nine hundred ninety-eight thousand, nine hundred eighty-five".