9895721 has 4 divisors (see below), whose sum is σ = 10795344. Its totient is φ = 8996100.

The previous prime is 9895693. The next prime is 9895723. The reversal of 9895721 is 1275989.

9895721 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.

It is a cyclic number.

It is not a de Polignac number, because 9895721 - 2²² = 5701417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9895723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449795 + ... + 449816.

It is an arithmetic number, because the mean of its divisors is an integer number (2698836).

Almost surely, 2^9895721 is an apocalyptic number.

It is an amenable number.

9895721 is a deficient number, since it is larger than the sum of its proper divisors (899623).

9895721 is a wasteful number, since it uses less digits than its factorization.

9895721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899622.

The product of its digits is 45360, while the sum is 41.

The square root of 9895721 is about 3145.7464932826. The cubic root of 9895721 is about 214.6919764383.

The spelling of 9895721 in words is "nine million, eight hundred ninety-five thousand, seven hundred twenty-one".