808091281889 has 2 divisors, whose sum is σ = 808091281890. Its totient is φ = 808091281888.

The previous prime is 808091281867. The next prime is 808091281909. The reversal of 808091281889 is 988182190808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 766570291600 + 41520990289 = 875540^2 + 203767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-808091281889 is a prime.

It is not a weakly prime, because it can be changed into another prime (808091281849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404045640944 + 404045640945.

It is an arithmetic number, because the mean of its divisors is an integer number (404045640945).

Almost surely, 2^808091281889 is an apocalyptic number.

It is an amenable number.

808091281889 is a deficient number, since it is larger than the sum of its proper divisors (1).

808091281889 is an equidigital number, since it uses as much as digits as its factorization.

808091281889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5308416, while the sum is 62.

The spelling of 808091281889 in words is "eight hundred eight billion, ninety-one million, two hundred eighty-one thousand, eight hundred eighty-nine".