9797221 has 4 divisors (see below), whose sum is σ = 11196832. Its totient is φ = 8397612.

The previous prime is 9797191. The next prime is 9797231. The reversal of 9797221 is 1227979.

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 9797221 - 2⁵ = 9797189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9797231) 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, 699795 + ... + 699808.

It is an arithmetic number, because the mean of its divisors is an integer number (2799208).

Almost surely, 2^9797221 is an apocalyptic number.

It is an amenable number.

9797221 is a deficient number, since it is larger than the sum of its proper divisors (1399611).

9797221 is a wasteful number, since it uses less digits than its factorization.

9797221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399610.

The product of its digits is 15876, while the sum is 37.

The square root of 9797221 is about 3130.0512775352. The cubic root of 9797221 is about 213.9772663421.

The spelling of 9797221 in words is "nine million, seven hundred ninety-seven thousand, two hundred twenty-one".