9984820985 has 8 divisors (see below), whose sum is σ = 12069244296. Its totient is φ = 7929550720.

The previous prime is 9984820957. The next prime is 9984821009. The reversal of 9984820985 is 5890284899.

It can be written as a sum of positive squares in 4 ways, for example, as 2038703104 + 7946117881 = 45152^2 + 89141^2 .

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

It is not a de Polignac number, because 9984820985 - 2⁶ = 9984820921 is a prime.

It is a Duffinian 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, 7287506 + ... + 7288875.

It is an arithmetic number, because the mean of its divisors is an integer number (1508655537).

Almost surely, 2^9984820985 is an apocalyptic number.

It is an amenable number.

9984820985 is a deficient number, since it is larger than the sum of its proper divisors (2084423311).

9984820985 is a wasteful number, since it uses less digits than its factorization.

9984820985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14576523.

The product of its (nonzero) digits is 14929920, while the sum is 62.

The square root of 9984820985 is about 99924.0761028092. The cubic root of 9984820985 is about 2153.3440648092.

The spelling of 9984820985 in words is "nine billion, nine hundred eighty-four million, eight hundred twenty thousand, nine hundred eighty-five".