2004091 has 2 divisors, whose sum is σ = 2004092. Its totient is φ = 2004090.

The previous prime is 2004083. The next prime is 2004097. The reversal of 2004091 is 1904002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2004091 - 2³ = 2004083 is a prime.

It is not a weakly prime, because it can be changed into another prime (2004097) 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, 1002045 + 1002046.

It is an arithmetic number, because the mean of its divisors is an integer number (1002046).

2^2004091 is an apocalyptic number.

2004091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2004091 is an equidigital number, since it uses as much as digits as its factorization.

2004091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2004091 is about 1415.6592104034. The cubic root of 2004091 is about 126.0779520996.

Adding to 2004091 its reverse (1904002), we get a palindrome (3908093).

The spelling of 2004091 in words is "two million, four thousand, ninety-one".