823983 has 4 divisors (see below), whose sum is σ = 1098648. Its totient is φ = 549320.

The previous prime is 823981. The next prime is 823993. The reversal of 823983 is 389328.

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 823983 - 2¹ = 823981 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137328 + ... + 137333.

It is an arithmetic number, because the mean of its divisors is an integer number (274662).

2⁸²³⁹⁸³ is an apocalyptic number.

823983 is a deficient number, since it is larger than the sum of its proper divisors (274665).

823983 is a wasteful number, since it uses less digits than its factorization.

823983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274664.

The product of its digits is 10368, while the sum is 33.

The square root of 823983 is about 907.7350935157. The cubic root of 823983 is about 93.7503182211.

The spelling of 823983 in words is "eight hundred twenty-three thousand, nine hundred eighty-three".