9921304 has 32 divisors (see below), whose sum is σ = 19261440. Its totient is φ = 4788000.

The previous prime is 9921299. The next prime is 9921311. The reversal of 9921304 is 4031299.

It is a happy number.

It is a super-3 number, since 3×9921304³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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, 51849 + ... + 52039.

It is an arithmetic number, because the mean of its divisors is an integer number (601920).

Almost surely, 2^9921304 is an apocalyptic number.

It is an amenable number.

9921304 is a deficient number, since it is larger than the sum of its proper divisors (9340136).

9921304 is a wasteful number, since it uses less digits than its factorization.

9921304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 9921304 is about 3149.8101530092. The cubic root of 9921304 is about 214.8768286747.

The spelling of 9921304 in words is "nine million, nine hundred twenty-one thousand, three hundred four".