9791321922 has 54 divisors (see below), whose sum is σ = 21549896121. Its totient is φ = 3212976480.

The previous prime is 9791321893. The next prime is 9791321929. The reversal of 9791321922 is 2291231979.

It can be written as a sum of positive squares in 2 ways, for example, as 9478774881 + 312547041 = 97359^2 + 17679^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=69969.

It is not an unprimeable number, because it can be changed into a prime (9791321929) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 34844422 + ... + 34844702.

Almost surely, 2^9791321922 is an apocalyptic number.

9791321922 is an abundant number, since it is smaller than the sum of its proper divisors (11758574199).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9791321922 is an equidigital number, since it uses as much as digits as its factorization.

9791321922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 369 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 9791321922 is about 98951.1087456831. The cubic root of 9791321922 is about 2139.3431123566.

The spelling of 9791321922 in words is "nine billion, seven hundred ninety-one million, three hundred twenty-one thousand, nine hundred twenty-two".