818009009 has 12 divisors (see below), whose sum is σ = 887460864. Its totient is φ = 753497664.

The previous prime is 818008993. The next prime is 818009011. The reversal of 818009009 is 900900818.

It is a happy number.

It is not a de Polignac number, because 818009009 - 2⁴ = 818008993 is a prime.

It is a Duffinian number.

818009009 is a modest number, since divided by 9009 gives 818 as remainder.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 818009009.

It is not an unprimeable number, because it can be changed into a prime (818009069) 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, 16529 + ... + 43694.

It is an arithmetic number, because the mean of its divisors is an integer number (73955072).

Almost surely, 2^818009009 is an apocalyptic number.

It is an amenable number.

818009009 is a deficient number, since it is larger than the sum of its proper divisors (69451855).

818009009 is a wasteful number, since it uses less digits than its factorization.

818009009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60304 (or 60287 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 818009009 is about 28600.8567878656. The cubic root of 818009009 is about 935.2320085409.

It can be divided in two parts, 81800 and 9009, that added together give a palindrome (90809).

The spelling of 818009009 in words is "eight hundred eighteen million, nine thousand, nine".