80845691 has 2 divisors, whose sum is σ = 80845692. Its totient is φ = 80845690.

The previous prime is 80845673. The next prime is 80845711. The reversal of 80845691 is 19654808.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80845691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80845601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40422845 + 40422846.

It is an arithmetic number, because the mean of its divisors is an integer number (40422846).

Almost surely, 2^80845691 is an apocalyptic number.

80845691 is a deficient number, since it is larger than the sum of its proper divisors (1).

80845691 is an equidigital number, since it uses as much as digits as its factorization.

80845691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 80845691 is about 8991.4231910193. The cubic root of 80845691 is about 432.3999407676.

The spelling of 80845691 in words is "eighty million, eight hundred forty-five thousand, six hundred ninety-one".