9986731 has 2 divisors, whose sum is σ = 9986732. Its totient is φ = 9986730.

The previous prime is 9986699. The next prime is 9986747. The reversal of 9986731 is 1376899.

9986731 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1376899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9986731 - 2⁵ = 9986699 is a prime.

It is a super-2 number, since 2×9986731² = 199469592132722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9986791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993365 + 4993366.

It is an arithmetic number, because the mean of its divisors is an integer number (4993366).

Almost surely, 2^9986731 is an apocalyptic number.

9986731 is a deficient number, since it is larger than the sum of its proper divisors (1).

9986731 is an equidigital number, since it uses as much as digits as its factorization.

9986731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 9986731 is about 3160.1789506292. The cubic root of 9986731 is about 215.3481361787.

The spelling of 9986731 in words is "nine million, nine hundred eighty-six thousand, seven hundred thirty-one".