9939321 has 32 divisors (see below), whose sum is σ = 17233920. Its totient is φ = 5542992.

The previous prime is 9939301. The next prime is 9939323. The reversal of 9939321 is 1239399.

It is not a de Polignac number, because 9939321 - 2⁹ = 9938809 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9939323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7516 + ... + 8738.

It is an arithmetic number, because the mean of its divisors is an integer number (538560).

Almost surely, 2^9939321 is an apocalyptic number.

It is an amenable number.

9939321 is a deficient number, since it is larger than the sum of its proper divisors (7294599).

9939321 is a wasteful number, since it uses less digits than its factorization.

9939321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282 (or 1276 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 9939321 is about 3152.6688693867. The cubic root of 9939321 is about 215.0068214890.

It can be divided in two parts, 993 and 9321, that multiplied together give a triangular number (9255753 = T₄₃₀₂).

The spelling of 9939321 in words is "nine million, nine hundred thirty-nine thousand, three hundred twenty-one".