8081691 has 8 divisors (see below), whose sum is σ = 11147280. Its totient is φ = 5201952.

The previous prime is 8081663. The next prime is 8081699. The reversal of 8081691 is 1961808.

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

It is not a de Polignac number, because 8081691 - 2⁵ = 8081659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8081699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46360 + ... + 46533.

It is an arithmetic number, because the mean of its divisors is an integer number (1393410).

Almost surely, 2^8081691 is an apocalyptic number.

8081691 is a deficient number, since it is larger than the sum of its proper divisors (3065589).

8081691 is a wasteful number, since it uses less digits than its factorization.

8081691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92925.

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

The square root of 8081691 is about 2842.8315110115. The cubic root of 8081691 is about 200.6784542302.

The spelling of 8081691 in words is "eight million, eighty-one thousand, six hundred ninety-one".