9898987031 has 2 divisors, whose sum is σ = 9898987032. Its totient is φ = 9898987030.

The previous prime is 9898987027. The next prime is 9898987039. The reversal of 9898987031 is 1307898989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9898987031 - 2² = 9898987027 is a prime.

It is a super-2 number, since 2×9898987031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9898987039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4949493515 + 4949493516.

It is an arithmetic number, because the mean of its divisors is an integer number (4949493516).

Almost surely, 2^9898987031 is an apocalyptic number.

9898987031 is a deficient number, since it is larger than the sum of its proper divisors (1).

9898987031 is an equidigital number, since it uses as much as digits as its factorization.

9898987031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7838208, while the sum is 62.

The square root of 9898987031 is about 99493.6532196904. The cubic root of 9898987031 is about 2147.1559316192.

The spelling of 9898987031 in words is "nine billion, eight hundred ninety-eight million, nine hundred eighty-seven thousand, thirty-one".