812818883 has 4 divisors (see below), whose sum is σ = 816903600. Its totient is φ = 808734168.

The previous prime is 812818861. The next prime is 812818889. The reversal of 812818883 is 388818218.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 812818883 - 2⁶ = 812818819 is a prime.

It is a super-2 number, since 2×812818883² = 1321349073122735378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812818889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2042060 + ... + 2042457.

It is an arithmetic number, because the mean of its divisors is an integer number (204225900).

Almost surely, 2^812818883 is an apocalyptic number.

812818883 is a deficient number, since it is larger than the sum of its proper divisors (4084717).

812818883 is a wasteful number, since it uses less digits than its factorization.

812818883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4084716.

The product of its digits is 196608, while the sum is 47.

The square root of 812818883 is about 28509.9786566037. The cubic root of 812818883 is about 933.2498485559.

The spelling of 812818883 in words is "eight hundred twelve million, eight hundred eighteen thousand, eight hundred eighty-three".