9984749 has 4 divisors (see below), whose sum is σ = 10027836. Its totient is φ = 9941664.

The previous prime is 9984743. The next prime is 9984757. The reversal of 9984749 is 9474899.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7155625 + 2829124 = 2675^2 + 1682^2 .

It is a cyclic number.

It is not a de Polignac number, because 9984749 - 2⁸ = 9984493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9984697 and 9984706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9984743) 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 3 ways as a sum of consecutive naturals, for example, 21194 + ... + 21659.

It is an arithmetic number, because the mean of its divisors is an integer number (2506959).

Almost surely, 2^9984749 is an apocalyptic number.

It is an amenable number.

9984749 is a deficient number, since it is larger than the sum of its proper divisors (43087).

9984749 is a wasteful number, since it uses less digits than its factorization.

9984749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43086.

The product of its digits is 653184, while the sum is 50.

The square root of 9984749 is about 3159.8653452323. The cubic root of 9984749 is about 215.3338889993. Note that the first 3 decimals are identical.

It can be divided in two parts, 99 and 84749, that added together give a palindrome (84848).

The spelling of 9984749 in words is "nine million, nine hundred eighty-four thousand, seven hundred forty-nine".