8871681 has 16 divisors (see below), whose sum is σ = 14559104. Its totient is φ = 4679424.

The previous prime is 8871677. The next prime is 8871683. The reversal of 8871681 is 1861788.

It is not a de Polignac number, because 8871681 - 2² = 8871677 is a prime.

It is a super-2 number, since 2×8871681² = 157413447531522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (8871683) 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 in 15 ways as a sum of consecutive naturals, for example, 15976 + ... + 16521.

It is an arithmetic number, because the mean of its divisors is an integer number (909944).

Almost surely, 2^8871681 is an apocalyptic number.

It is an amenable number.

8871681 is a deficient number, since it is larger than the sum of its proper divisors (5687423).

8871681 is a wasteful number, since it uses less digits than its factorization.

8871681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32520.

The product of its digits is 21504, while the sum is 39.

The square root of 8871681 is about 2978.5367212777. The cubic root of 8871681 is about 207.0150750999.

The spelling of 8871681 in words is "eight million, eight hundred seventy-one thousand, six hundred eighty-one".