823943 has 4 divisors (see below), whose sum is σ = 826008. Its totient is φ = 821880.

The previous prime is 823913. The next prime is 823961. The reversal of 823943 is 349328.

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 823943 - 2¹⁴ = 807559 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221 + ... + 1302.

It is an arithmetic number, because the mean of its divisors is an integer number (206502).

2⁸²³⁹⁴³ is an apocalyptic number.

823943 is a deficient number, since it is larger than the sum of its proper divisors (2065).

823943 is a wasteful number, since it uses less digits than its factorization.

823943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064.

The product of its digits is 5184, while the sum is 29.

The square root of 823943 is about 907.7130603886. The cubic root of 823943 is about 93.7488011699.

The spelling of 823943 in words is "eight hundred twenty-three thousand, nine hundred forty-three".