9227721 has 8 divisors (see below), whose sum is σ = 12317760. Its totient is φ = 6144752.

The previous prime is 9227717. The next prime is 9227723. The reversal of 9227721 is 1277229.

It is a happy number.

9227721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9227721 - 2² = 9227717 is a prime.

9227721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9227723) 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, 3691 + ... + 5663.

It is an arithmetic number, because the mean of its divisors is an integer number (1539720).

Almost surely, 2^9227721 is an apocalyptic number.

It is an amenable number.

9227721 is a deficient number, since it is larger than the sum of its proper divisors (3090039).

9227721 is a wasteful number, since it uses less digits than its factorization.

9227721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535.

The product of its digits is 3528, while the sum is 30.

The square root of 9227721 is about 3037.7164120438. The cubic root of 9227721 is about 209.7481561453.

The spelling of 9227721 in words is "nine million, two hundred twenty-seven thousand, seven hundred twenty-one".