8423939 has 4 divisors (see below), whose sum is σ = 8518680. Its totient is φ = 8329200.

The previous prime is 8423929. The next prime is 8423953. The reversal of 8423939 is 9393248.

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 8423939 - 2⁴ = 8423923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8423929) 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, 47237 + ... + 47414.

It is an arithmetic number, because the mean of its divisors is an integer number (2129670).

Almost surely, 2^8423939 is an apocalyptic number.

8423939 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

8423939 is a deficient number, since it is larger than the sum of its proper divisors (94741).

8423939 is an equidigital number, since it uses as much as digits as its factorization.

8423939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94740.

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

The square root of 8423939 is about 2902.4022808701. The cubic root of 8423939 is about 203.4721954498.

The spelling of 8423939 in words is "eight million, four hundred twenty-three thousand, nine hundred thirty-nine".