9986831 has 2 divisors, whose sum is σ = 9986832. Its totient is φ = 9986830.

The previous prime is 9986813. The next prime is 9986849. The reversal of 9986831 is 1386899.

Together with previous prime (9986813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (9986813) and next prime (9986849).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9986831 is a prime.

It is a super-2 number, since 2×9986831² = 199473586845122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9986861) 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, 4993415 + 4993416.

It is an arithmetic number, because the mean of its divisors is an integer number (4993416).

Almost surely, 2^9986831 is an apocalyptic number.

9986831 is a deficient number, since it is larger than the sum of its proper divisors (1).

9986831 is an equidigital number, since it uses as much as digits as its factorization.

9986831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 44.

The square root of 9986831 is about 3160.1947724784. The cubic root of 9986831 is about 215.3488549572.

It can be divided in two parts, 99868 and 31, that added together give a palindrome (99899).

The spelling of 9986831 in words is "nine million, nine hundred eighty-six thousand, eight hundred thirty-one".