808804421 has 2 divisors, whose sum is σ = 808804422. Its totient is φ = 808804420.

The previous prime is 808804363. The next prime is 808804439. The reversal of 808804421 is 124408808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 790228321 + 18576100 = 28111^2 + 4310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-808804421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808804021) 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, 404402210 + 404402211.

It is an arithmetic number, because the mean of its divisors is an integer number (404402211).

Almost surely, 2^808804421 is an apocalyptic number.

It is an amenable number.

808804421 is a deficient number, since it is larger than the sum of its proper divisors (1).

808804421 is an equidigital number, since it uses as much as digits as its factorization.

808804421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16384, while the sum is 35.

The square root of 808804421 is about 28439.4870031089. The cubic root of 808804421 is about 931.7108911426.

The spelling of 808804421 in words is "eight hundred eight million, eight hundred four thousand, four hundred twenty-one".