818470989 has 12 divisors (see below), whose sum is σ = 1351126816. Its totient is φ = 467697672.

The previous prime is 818470981. The next prime is 818470993. The reversal of 818470989 is 989074818.

818470989 is a `hidden beast` number, since 81 + 8 + 470 + 98 + 9 = 666.

It is not a de Polignac number, because 818470989 - 2³ = 818470981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818470981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6495739 + ... + 6495864.

Almost surely, 2^818470989 is an apocalyptic number.

It is an amenable number.

818470989 is a deficient number, since it is larger than the sum of its proper divisors (532655827).

818470989 is a wasteful number, since it uses less digits than its factorization.

818470989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12991616 (or 12991613 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 818470989 is about 28608.9319793662. The cubic root of 818470989 is about 935.4080364198.

The spelling of 818470989 in words is "eight hundred eighteen million, four hundred seventy thousand, nine hundred eighty-nine".