804091 has 2 divisors, whose sum is σ = 804092. Its totient is φ = 804090.

The previous prime is 804077. The next prime is 804107. The reversal of 804091 is 190408.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 804091 - 2⁵ = 804059 is a prime.

It is not a weakly prime, because it can be changed into another prime (804031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402045 + 402046.

It is an arithmetic number, because the mean of its divisors is an integer number (402046).

2⁸⁰⁴⁰⁹¹ is an apocalyptic number.

804091 is a deficient number, since it is larger than the sum of its proper divisors (1).

804091 is an equidigital number, since it uses as much as digits as its factorization.

804091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 804091 is about 896.7112132677. The cubic root of 804091 is about 92.9897472029.

Adding to 804091 its reverse (190408), we get a palindrome (994499).

The spelling of 804091 in words is "eight hundred four thousand, ninety-one".