9921716 has 36 divisors (see below), whose sum is σ = 20377728. Its totient is φ = 4214448.

The previous prime is 9921679. The next prime is 9921731. The reversal of 9921716 is 6171299.

9921716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43595 + ... + 43821.

It is an arithmetic number, because the mean of its divisors is an integer number (566048).

Almost surely, 2^9921716 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 9921716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10188864).

9921716 is an abundant number, since it is smaller than the sum of its proper divisors (10456012).

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

9921716 is a wasteful number, since it uses less digits than its factorization.

9921716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 459 counting only the distinct ones).

The product of its digits is 6804, while the sum is 35.

The square root of 9921716 is about 3149.8755530973. The cubic root of 9921716 is about 214.8798030158.

The spelling of 9921716 in words is "nine million, nine hundred twenty-one thousand, seven hundred sixteen".