816845983 has 16 divisors (see below), whose sum is σ = 843955200. Its totient is φ = 790292160.

The previous prime is 816845963. The next prime is 816846007. The reversal of 816845983 is 389548618.

It is not a de Polignac number, because 816845983 - 2⁵ = 816845951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 816845983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816845963) 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 15 ways as a sum of consecutive naturals, for example, 1860478 + ... + 1860916.

It is an arithmetic number, because the mean of its divisors is an integer number (52747200).

Almost surely, 2^816845983 is an apocalyptic number.

816845983 is a deficient number, since it is larger than the sum of its proper divisors (27109217).

816845983 is a wasteful number, since it uses less digits than its factorization.

816845983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942.

The product of its digits is 1658880, while the sum is 52.

The square root of 816845983 is about 28580.5175425499. The cubic root of 816845983 is about 934.7885680140.

The spelling of 816845983 in words is "eight hundred sixteen million, eight hundred forty-five thousand, nine hundred eighty-three".