9792221 has 4 divisors (see below), whose sum is σ = 10368252. Its totient is φ = 9216192.

The previous prime is 9792217. The next prime is 9792229. The reversal of 9792221 is 1222979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222979 = 23 ⋅53173.

It can be written as a sum of positive squares in 2 ways, for example, as 5736025 + 4056196 = 2395^2 + 2014^2 .

It is a cyclic number.

It is not a de Polignac number, because 9792221 - 2² = 9792217 is a prime.

It is a super-2 number, since 2×9792221² = 191775184225682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9792229) 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, 287990 + ... + 288023.

It is an arithmetic number, because the mean of its divisors is an integer number (2592063).

Almost surely, 2^9792221 is an apocalyptic number.

It is an amenable number.

9792221 is a deficient number, since it is larger than the sum of its proper divisors (576031).

9792221 is a wasteful number, since it uses less digits than its factorization.

9792221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576030.

The product of its digits is 4536, while the sum is 32.

The square root of 9792221 is about 3129.2524666444. The cubic root of 9792221 is about 213.9408591341.

The spelling of 9792221 in words is "nine million, seven hundred ninety-two thousand, two hundred twenty-one".