9899785 has 8 divisors (see below), whose sum is σ = 13576896. Its totient is φ = 6788400.

The previous prime is 9899783. The next prime is 9899789. The reversal of 9899785 is 5879989.

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

It is not a de Polignac number, because 9899785 - 2¹ = 9899783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9899783) 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 in 7 ways as a sum of consecutive naturals, for example, 141391 + ... + 141460.

It is an arithmetic number, because the mean of its divisors is an integer number (1697112).

Almost surely, 2^9899785 is an apocalyptic number.

It is an amenable number.

9899785 is a deficient number, since it is larger than the sum of its proper divisors (3677111).

9899785 is a wasteful number, since it uses less digits than its factorization.

9899785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282863.

The product of its digits is 1632960, while the sum is 55.

The square root of 9899785 is about 3146.3923785822. The cubic root of 9899785 is about 214.7213624992.

The spelling of 9899785 in words is "nine million, eight hundred ninety-nine thousand, seven hundred eighty-five".