8091681 has 8 divisors (see below), whose sum is σ = 11618880. Its totient is φ = 4979472.

The previous prime is 8091679. The next prime is 8091683. The reversal of 8091681 is 1861908.

8091681 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8091679) and next prime (8091683).

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

It is not a de Polignac number, because 8091681 - 2¹ = 8091679 is a prime.

It is a super-2 number, since 2×8091681² = 130950602811522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8091683) 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, 103701 + ... + 103778.

It is an arithmetic number, because the mean of its divisors is an integer number (1452360).

Almost surely, 2^8091681 is an apocalyptic number.

It is an amenable number.

8091681 is a deficient number, since it is larger than the sum of its proper divisors (3527199).

8091681 is a wasteful number, since it uses less digits than its factorization.

8091681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207495.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 8091681 is about 2844.5880193800. The cubic root of 8091681 is about 200.7611082305.

The spelling of 8091681 in words is "eight million, ninety-one thousand, six hundred eighty-one".