1080085691 has 2 divisors, whose sum is σ = 1080085692. Its totient is φ = 1080085690.

The previous prime is 1080085679. The next prime is 1080085717. The reversal of 1080085691 is 1965800801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1080085691 - 2²⁶ = 1012976827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1080085651) 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 as a sum of consecutive naturals, namely, 540042845 + 540042846.

It is an arithmetic number, because the mean of its divisors is an integer number (540042846).

Almost surely, 2^1080085691 is an apocalyptic number.

1080085691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1080085691 is an equidigital number, since it uses as much as digits as its factorization.

1080085691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 1080085691 is about 32864.6571714966. The cubic root of 1080085691 is about 1026.0127023900.

The spelling of 1080085691 in words is "one billion, eighty million, eighty-five thousand, six hundred ninety-one".