804191 has 2 divisors, whose sum is σ = 804192. Its totient is φ = 804190.

The previous prime is 804179. The next prime is 804197. The reversal of 804191 is 191408.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 804191 - 2⁶ = 804127 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (804197) 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, 402095 + 402096.

It is an arithmetic number, because the mean of its divisors is an integer number (402096).

2⁸⁰⁴¹⁹¹ is an apocalyptic number.

804191 is a deficient number, since it is larger than the sum of its proper divisors (1).

804191 is an equidigital number, since it uses as much as digits as its factorization.

804191 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 23.

The square root of 804191 is about 896.7669708458. The cubic root of 804191 is about 92.9936019031.

Adding to 804191 its reverse (191408), we get a palindrome (995599).

The spelling of 804191 in words is "eight hundred four thousand, one hundred ninety-one".