9986631 has 16 divisors (see below), whose sum is σ = 13716864. Its totient is φ = 6460064.

The previous prime is 9986611. The next prime is 9986651. The reversal of 9986631 is 1366899.

It is an interprime number because it is at equal distance from previous prime (9986611) and next prime (9986651).

It is not a de Polignac number, because 9986631 - 2⁶ = 9986567 is a prime.

It is a super-2 number, since 2×9986631² = 199465597460322, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16720 + ... + 17306.

It is an arithmetic number, because the mean of its divisors is an integer number (857304).

Almost surely, 2^9986631 is an apocalyptic number.

9986631 is a deficient number, since it is larger than the sum of its proper divisors (3730233).

9986631 is a wasteful number, since it uses less digits than its factorization.

9986631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750.

The product of its digits is 69984, while the sum is 42.

The square root of 9986631 is about 3160.1631287008. The cubic root of 9986631 is about 215.3474173954.

The spelling of 9986631 in words is "nine million, nine hundred eighty-six thousand, six hundred thirty-one".