804163889 has 2 divisors, whose sum is σ = 804163890. Its totient is φ = 804163888.

The previous prime is 804163837. The next prime is 804163897. The reversal of 804163889 is 988361408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619611664 + 184552225 = 24892^2 + 13585^2 .

It is a cyclic number.

It is not a de Polignac number, because 804163889 - 2¹⁶ = 804098353 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (804163819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402081944 + 402081945.

It is an arithmetic number, because the mean of its divisors is an integer number (402081945).

Almost surely, 2^804163889 is an apocalyptic number.

It is an amenable number.

804163889 is a deficient number, since it is larger than the sum of its proper divisors (1).

804163889 is an equidigital number, since it uses as much as digits as its factorization.

804163889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 804163889 is about 28357.7835699478. The cubic root of 804163889 is about 929.9255688688.

The spelling of 804163889 in words is "eight hundred four million, one hundred sixty-three thousand, eight hundred eighty-nine".