9987081 has 8 divisors (see below), whose sum is σ = 14340480. Its totient is φ = 6145872.

The previous prime is 9987071. The next prime is 9987091. The reversal of 9987081 is 1807899.

It is an interprime number because it is at equal distance from previous prime (9987071) and next prime (9987091).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9987081 - 2⁹ = 9986569 is a prime.

It is a super-2 number, since 2×9987081² = 199483573801122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9987001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128001 + ... + 128078.

It is an arithmetic number, because the mean of its divisors is an integer number (1792560).

Almost surely, 2^9987081 is an apocalyptic number.

It is an amenable number.

9987081 is a deficient number, since it is larger than the sum of its proper divisors (4353399).

9987081 is a wasteful number, since it uses less digits than its factorization.

9987081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256095.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 9987081 is about 3160.2343267549. The cubic root of 9987081 is about 215.3506518824.

The spelling of 9987081 in words is "nine million, nine hundred eighty-seven thousand, eighty-one".