9984491 has 16 divisors (see below), whose sum is σ = 11664000. Its totient is φ = 8446080.

The previous prime is 9984479. The next prime is 9984493. The reversal of 9984491 is 1944899.

It is a cyclic number.

It is not a de Polignac number, because 9984491 - 2¹⁸ = 9722347 is a prime.

It is a Duffinian number.

9984491 is a modest number, since divided by 4491 gives 998 as remainder.

It is not an unprimeable number, because it can be changed into a prime (9984493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19760 + ... + 20258.

It is an arithmetic number, because the mean of its divisors is an integer number (729000).

Almost surely, 2^9984491 is an apocalyptic number.

9984491 is a deficient number, since it is larger than the sum of its proper divisors (1679509).

9984491 is a wasteful number, since it uses less digits than its factorization.

9984491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634.

The product of its digits is 93312, while the sum is 44.

The square root of 9984491 is about 3159.8245204441. The cubic root of 9984491 is about 215.3320342833.

The spelling of 9984491 in words is "nine million, nine hundred eighty-four thousand, four hundred ninety-one".