8008681 has 4 divisors (see below), whose sum is σ = 8029252. Its totient is φ = 7988112.

The previous prime is 8008673. The next prime is 8008691. The reversal of 8008681 is 1868008.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7182400 + 826281 = 2680^2 + 909^2 .

It is a cyclic number.

It is not a de Polignac number, because 8008681 - 2³ = 8008673 is a prime.

It is a super-2 number, since 2×8008681² = 128277942719522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8008631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9690 + ... + 10483.

It is an arithmetic number, because the mean of its divisors is an integer number (2007313).

Almost surely, 2^8008681 is an apocalyptic number.

It is an amenable number.

8008681 is a deficient number, since it is larger than the sum of its proper divisors (20571).

8008681 is a wasteful number, since it uses less digits than its factorization.

8008681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20570.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 8008681 is about 2829.9613071560. The cubic root of 8008681 is about 200.0723155158.

The spelling of 8008681 in words is "eight million, eight thousand, six hundred eighty-one".