8081689 has 16 divisors (see below), whose sum is σ = 10183680. Its totient is φ = 6230160.

The previous prime is 8081663. The next prime is 8081699. The reversal of 8081689 is 9861808.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8081689 - 2⁵ = 8081657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8081629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7422 + ... + 8440.

It is an arithmetic number, because the mean of its divisors is an integer number (636480).

Almost surely, 2^8081689 is an apocalyptic number.

It is an amenable number.

8081689 is a deficient number, since it is larger than the sum of its proper divisors (2101991).

8081689 is a wasteful number, since it uses less digits than its factorization.

8081689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 8081689 is about 2842.8311592495. The cubic root of 8081689 is about 200.6784376760.

The spelling of 8081689 in words is "eight million, eighty-one thousand, six hundred eighty-nine".