818912889 has 8 divisors (see below), whose sum is σ = 1213204320. Its totient is φ = 545941908.

The previous prime is 818912881. The next prime is 818912909. The reversal of 818912889 is 988219818.

It is not a de Polignac number, because 818912889 - 2³ = 818912881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (818912881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15165027 + ... + 15165080.

It is an arithmetic number, because the mean of its divisors is an integer number (151650540).

Almost surely, 2^818912889 is an apocalyptic number.

It is an amenable number.

818912889 is a deficient number, since it is larger than the sum of its proper divisors (394291431).

818912889 is a wasteful number, since it uses less digits than its factorization.

818912889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30330116 (or 30330110 counting only the distinct ones).

The product of its digits is 663552, while the sum is 54.

The square root of 818912889 is about 28616.6540496963. The cubic root of 818912889 is about 935.5763512602.

The spelling of 818912889 in words is "eight hundred eighteen million, nine hundred twelve thousand, eight hundred eighty-nine".