423839 has 4 divisors (see below), whose sum is σ = 456456. Its totient is φ = 391224.

The previous prime is 423823. The next prime is 423847. The reversal of 423839 is 938324.

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 423839 - 2⁴ = 423823 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423859) 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, 16289 + ... + 16314.

It is an arithmetic number, because the mean of its divisors is an integer number (114114).

2⁴²³⁸³⁹ is an apocalyptic number.

423839 is a deficient number, since it is larger than the sum of its proper divisors (32617).

423839 is a wasteful number, since it uses less digits than its factorization.

423839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32616.

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

The square root of 423839 is about 651.0291852137. The cubic root of 423839 is about 75.1162050440.

The spelling of 423839 in words is "four hundred twenty-three thousand, eight hundred thirty-nine".