9981876731 has 2 divisors, whose sum is σ = 9981876732. Its totient is φ = 9981876730.

The previous prime is 9981876691. The next prime is 9981876787. The reversal of 9981876731 is 1376781899.

It is a weak prime.

It is an emirp because it is prime and its reverse (1376781899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9981876731 - 2¹⁴ = 9981860347 is a prime.

It is a super-2 number, since 2×9981876731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9981276731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4990938365 + 4990938366.

It is an arithmetic number, because the mean of its divisors is an integer number (4990938366).

Almost surely, 2^9981876731 is an apocalyptic number.

9981876731 is a deficient number, since it is larger than the sum of its proper divisors (1).

9981876731 is an equidigital number, since it uses as much as digits as its factorization.

9981876731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 59.

The square root of 9981876731 is about 99909.3425611439. The cubic root of 9981876731 is about 2153.1323896691.

The spelling of 9981876731 in words is "nine billion, nine hundred eighty-one million, eight hundred seventy-six thousand, seven hundred thirty-one".