9712597221 has 16 divisors (see below), whose sum is σ = 14586145920. Its totient is φ = 6386364000.

The previous prime is 9712597207. The next prime is 9712597231. The reversal of 9712597221 is 1227952179.

9712597221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9712597221 - 2¹⁴ = 9712580837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9712597231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2461905 + ... + 2465846.

It is an arithmetic number, because the mean of its divisors is an integer number (911634120).

Almost surely, 2^9712597221 is an apocalyptic number.

It is an amenable number.

9712597221 is a deficient number, since it is larger than the sum of its proper divisors (4873548699).

9712597221 is a wasteful number, since it uses less digits than its factorization.

9712597221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4927833 (or 4927827 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 9712597221 is about 98552.5099680368. The cubic root of 9712597221 is about 2133.5940571292.

The spelling of 9712597221 in words is "nine billion, seven hundred twelve million, five hundred ninety-seven thousand, two hundred twenty-one".