843040823 has 4 divisors (see below), whose sum is σ = 843563160. Its totient is φ = 842518488.

The previous prime is 843040787. The next prime is 843040867. The reversal of 843040823 is 328040348.

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 843040823 - 2¹⁴ = 843024439 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 843040823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (843040223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258740 + ... + 261977.

It is an arithmetic number, because the mean of its divisors is an integer number (210890790).

Almost surely, 2^843040823 is an apocalyptic number.

843040823 is a deficient number, since it is larger than the sum of its proper divisors (522337).

843040823 is a wasteful number, since it uses less digits than its factorization.

843040823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522336.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 843040823 is about 29035.1652828084. The cubic root of 843040823 is about 944.6759703900.

The spelling of 843040823 in words is "eight hundred forty-three million, forty thousand, eight hundred twenty-three".