9798798931 has 2 divisors, whose sum is σ = 9798798932. Its totient is φ = 9798798930.

The previous prime is 9798798913. The next prime is 9798798973. The reversal of 9798798931 is 1398978979.

Together with previous prime (9798798913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9798798931 - 2⁷ = 9798798803 is a prime.

It is a super-2 number, since 2×9798798931² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9798792931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4899399465 + 4899399466.

It is an arithmetic number, because the mean of its divisors is an integer number (4899399466).

Almost surely, 2^9798798931 is an apocalyptic number.

9798798931 is a deficient number, since it is larger than the sum of its proper divisors (1).

9798798931 is an equidigital number, since it uses as much as digits as its factorization.

9798798931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61725888, while the sum is 70.

The square root of 9798798931 is about 98988.8828657037. The cubic root of 9798798931 is about 2139.8875338310.

The spelling of 9798798931 in words is "nine billion, seven hundred ninety-eight million, seven hundred ninety-eight thousand, nine hundred thirty-one".