9906984 has 24 divisors (see below), whose sum is σ = 26831610. Its totient is φ = 3302304.

The previous prime is 9906983. The next prime is 9906991. The reversal of 9906984 is 4896099.

It can be written as a sum of positive squares in only one way, i.e., 8538084 + 1368900 = 2922^2 + 1170^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (9906983) 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 5 ways as a sum of consecutive naturals, for example, 68727 + ... + 68870.

Almost surely, 2^9906984 is an apocalyptic number.

It is an amenable number.

9906984 is an abundant number, since it is smaller than the sum of its proper divisors (16924626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9906984 is a wasteful number, since it uses less digits than its factorization.

9906984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137609 (or 137602 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 9906984 is about 3147.5361792996. The cubic root of 9906984 is about 214.7733974524.

The spelling of 9906984 in words is "nine million, nine hundred six thousand, nine hundred eighty-four".