9736721 has 16 divisors (see below), whose sum is σ = 10886400. Its totient is φ = 8668800.

The previous prime is 9736717. The next prime is 9736729. The reversal of 9736721 is 1276379.

It is a cyclic number.

It is not a de Polignac number, because 9736721 - 2² = 9736717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9736729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22376 + ... + 22806.

It is an arithmetic number, because the mean of its divisors is an integer number (680400).

Almost surely, 2^9736721 is an apocalyptic number.

It is an amenable number.

9736721 is a deficient number, since it is larger than the sum of its proper divisors (1149679).

9736721 is a wasteful number, since it uses less digits than its factorization.

9736721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520.

The product of its digits is 15876, while the sum is 35.

The square root of 9736721 is about 3120.3719329593. The cubic root of 9736721 is about 213.5359043215.

The spelling of 9736721 in words is "nine million, seven hundred thirty-six thousand, seven hundred twenty-one".