9979321 has 4 divisors (see below), whose sum is σ = 10886544. Its totient is φ = 9072100.

The previous prime is 9979301. The next prime is 9979327. The reversal of 9979321 is 1239799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9979321 - 2¹¹ = 9977273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9979327) 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 3 ways as a sum of consecutive naturals, for example, 453595 + ... + 453616.

It is an arithmetic number, because the mean of its divisors is an integer number (2721636).

Almost surely, 2^9979321 is an apocalyptic number.

It is an amenable number.

9979321 is a deficient number, since it is larger than the sum of its proper divisors (907223).

9979321 is a wasteful number, since it uses less digits than its factorization.

9979321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907222.

The product of its digits is 30618, while the sum is 40.

The square root of 9979321 is about 3159.0063311111. The cubic root of 9979321 is about 215.2948613376.

Subtracting from 9979321 its sum of digits (40), we obtain a square (9979281 = 3159²).

The spelling of 9979321 in words is "nine million, nine hundred seventy-nine thousand, three hundred twenty-one".