9968221 has 4 divisors (see below), whose sum is σ = 9976032. Its totient is φ = 9960412.

The previous prime is 9968219. The next prime is 9968243. The reversal of 9968221 is 1228699.

9968221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9968221 - 2¹ = 9968219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9968201) 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, 1495 + ... + 4708.

It is an arithmetic number, because the mean of its divisors is an integer number (2494008).

Almost surely, 2^9968221 is an apocalyptic number.

It is an amenable number.

9968221 is a deficient number, since it is larger than the sum of its proper divisors (7811).

9968221 is a wasteful number, since it uses less digits than its factorization.

9968221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7810.

The product of its digits is 15552, while the sum is 37.

The square root of 9968221 is about 3157.2489607251. The cubic root of 9968221 is about 215.2150075561.

The spelling of 9968221 in words is "nine million, nine hundred sixty-eight thousand, two hundred twenty-one".