9931822897 has 2 divisors, whose sum is σ = 9931822898. Its totient is φ = 9931822896.

The previous prime is 9931822889. The next prime is 9931822949. The reversal of 9931822897 is 7982281399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9824576161 + 107246736 = 99119^2 + 10356^2 .

It is a cyclic number.

It is not a de Polignac number, because 9931822897 - 2³ = 9931822889 is a prime.

It is a super-2 number, since 2×9931822897² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9931822837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965911448 + 4965911449.

It is an arithmetic number, because the mean of its divisors is an integer number (4965911449).

Almost surely, 2^9931822897 is an apocalyptic number.

It is an amenable number.

9931822897 is a deficient number, since it is larger than the sum of its proper divisors (1).

9931822897 is an equidigital number, since it uses as much as digits as its factorization.

9931822897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 58.

The square root of 9931822897 is about 99658.5314812535. The cubic root of 9931822897 is about 2149.5274170973.

The spelling of 9931822897 in words is "nine billion, nine hundred thirty-one million, eight hundred twenty-two thousand, eight hundred ninety-seven".