9988000931 has 2 divisors, whose sum is σ = 9988000932. Its totient is φ = 9988000930.

The previous prime is 9988000901. The next prime is 9988000937. The reversal of 9988000931 is 1390008899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9988000931 is a prime.

It is a super-2 number, since 2×9988000931² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (9988000937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994000465 + 4994000466.

It is an arithmetic number, because the mean of its divisors is an integer number (4994000466).

Almost surely, 2^9988000931 is an apocalyptic number.

9988000931 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988000931 is an equidigital number, since it uses as much as digits as its factorization.

9988000931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 9988000931 is about 99939.9866469873. The cubic root of 9988000931 is about 2153.5726381292.

The spelling of 9988000931 in words is "nine billion, nine hundred eighty-eight million, nine hundred thirty-one", and thus it is an aban number.