819983 has 8 divisors (see below), whose sum is σ = 873600. Its totient is φ = 767448.

The previous prime is 819977. The next prime is 819989. The reversal of 819983 is 389918.

It is an interprime number because it is at equal distance from previous prime (819977) and next prime (819989).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 819983 - 2¹⁰ = 818959 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 (819989) 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, 1748 + ... + 2166.

It is an arithmetic number, because the mean of its divisors is an integer number (109200).

2⁸¹⁹⁹⁸³ is an apocalyptic number.

819983 is a deficient number, since it is larger than the sum of its proper divisors (53617).

819983 is a wasteful number, since it uses less digits than its factorization.

819983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541.

The product of its digits is 15552, while the sum is 38.

The square root of 819983 is about 905.5291270854. The cubic root of 819983 is about 93.5983694045.

It can be divided in two parts, 8 and 19983, that added together give a palindrome (19991).

The spelling of 819983 in words is "eight hundred nineteen thousand, nine hundred eighty-three".