9795721 has 16 divisors (see below), whose sum is σ = 11038720. Its totient is φ = 8631360.

The previous prime is 9795683. The next prime is 9795727. The reversal of 9795721 is 1275979.

It is a cyclic number.

It is not a de Polignac number, because 9795721 - 2⁹ = 9795209 is a prime.

It is a super-2 number, since 2×9795721² = 191912299819682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9795727) 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 15 ways as a sum of consecutive naturals, for example, 43816 + ... + 44038.

It is an arithmetic number, because the mean of its divisors is an integer number (689920).

Almost surely, 2^9795721 is an apocalyptic number.

It is an amenable number.

9795721 is a deficient number, since it is larger than the sum of its proper divisors (1242999).

9795721 is a wasteful number, since it uses less digits than its factorization.

9795721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376.

The product of its digits is 39690, while the sum is 40.

The square root of 9795721 is about 3129.8116556751. The cubic root of 9795721 is about 213.9663454806.

The spelling of 9795721 in words is "nine million, seven hundred ninety-five thousand, seven hundred twenty-one".