8186881 has 4 divisors (see below), whose sum is σ = 8262100. Its totient is φ = 8111664.

The previous prime is 8186869. The next prime is 8186917. The reversal of 8186881 is 1886818.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1886818 = 2 ⋅943409.

It can be written as a sum of positive squares in 2 ways, for example, as 6548481 + 1638400 = 2559^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 8186881 - 2⁷ = 8186753 is a prime.

It is a super-2 number, since 2×8186881² = 134050041016322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8186831) 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 3 ways as a sum of consecutive naturals, for example, 37446 + ... + 37663.

It is an arithmetic number, because the mean of its divisors is an integer number (2065525).

Almost surely, 2^8186881 is an apocalyptic number.

It is an amenable number.

8186881 is a deficient number, since it is larger than the sum of its proper divisors (75219).

8186881 is a wasteful number, since it uses less digits than its factorization.

8186881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75218.

The product of its digits is 24576, while the sum is 40.

The square root of 8186881 is about 2861.2726189582. The cubic root of 8186881 is about 201.5453700684.

The spelling of 8186881 in words is "eight million, one hundred eighty-six thousand, eight hundred eighty-one".