9721968 has 40 divisors (see below), whose sum is σ = 25498368. Its totient is φ = 3191232.

The previous prime is 9721951. The next prime is 9721969. The reversal of 9721968 is 8691279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1705 + ... + 4727.

Almost surely, 2^9721968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9721968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12749184).

9721968 is an abundant number, since it is smaller than the sum of its proper divisors (15776400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9721968 is a wasteful number, since it uses less digits than its factorization.

9721968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101 (or 3095 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 9721968 is about 3118.0070557970. The cubic root of 9721968 is about 213.4280005197.

The spelling of 9721968 in words is "nine million, seven hundred twenty-one thousand, nine hundred sixty-eight".