2085691 has 2 divisors, whose sum is σ = 2085692. Its totient is φ = 2085690.

The previous prime is 2085673. The next prime is 2085697. The reversal of 2085691 is 1965802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2085691 - 2⁵ = 2085659 is a prime.

It is not a weakly prime, because it can be changed into another prime (2085697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1042845 + 1042846.

It is an arithmetic number, because the mean of its divisors is an integer number (1042846).

2^2085691 is an apocalyptic number.

2085691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2085691 is an equidigital number, since it uses as much as digits as its factorization.

2085691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 2085691 is about 1444.1921617292. The cubic root of 2085691 is about 127.7663992948.

The spelling of 2085691 in words is "two million, eighty-five thousand, six hundred ninety-one".