8243939 has 4 divisors (see below), whose sum is σ = 8993400. Its totient is φ = 7494480.

The previous prime is 8243927. The next prime is 8243947. The reversal of 8243939 is 9393428.

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 8243939 - 2¹² = 8239843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8243909) 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, 374714 + ... + 374735.

It is an arithmetic number, because the mean of its divisors is an integer number (2248350).

Almost surely, 2^8243939 is an apocalyptic number.

8243939 is a deficient number, since it is larger than the sum of its proper divisors (749461).

8243939 is a wasteful number, since it uses less digits than its factorization.

8243939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749460.

The product of its digits is 46656, while the sum is 38.

The square root of 8243939 is about 2871.2260447412. The cubic root of 8243939 is about 202.0125061695.

The spelling of 8243939 in words is "eight million, two hundred forty-three thousand, nine hundred thirty-nine".