808021859 has 2 divisors, whose sum is σ = 808021860. Its totient is φ = 808021858.

The previous prime is 808021847. The next prime is 808021927. The reversal of 808021859 is 958120808.

808021859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-808021859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (808021259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404010929 + 404010930.

It is an arithmetic number, because the mean of its divisors is an integer number (404010930).

Almost surely, 2^808021859 is an apocalyptic number.

808021859 is a deficient number, since it is larger than the sum of its proper divisors (1).

808021859 is an equidigital number, since it uses as much as digits as its factorization.

808021859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 808021859 is about 28425.7253029716. The cubic root of 808021859 is about 931.4103006245.

The spelling of 808021859 in words is "eight hundred eight million, twenty-one thousand, eight hundred fifty-nine".