6423839 has 4 divisors (see below), whose sum is σ = 6580560. Its totient is φ = 6267120.

The previous prime is 6423827. The next prime is 6423853. The reversal of 6423839 is 9383246.

It is a happy number.

6423839 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9383246 = 2 ⋅4691623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6423839 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 4¹¹ + 2¹⁷ + 3 + 8⁷ + 3 + 9 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6423799 and 6423808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6423889) 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, 78299 + ... + 78380.

It is an arithmetic number, because the mean of its divisors is an integer number (1645140).

Almost surely, 2^6423839 is an apocalyptic number.

6423839 is a deficient number, since it is larger than the sum of its proper divisors (156721).

6423839 is a wasteful number, since it uses less digits than its factorization.

6423839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156720.

The product of its digits is 31104, while the sum is 35.

The square root of 6423839 is about 2534.5293448686. The cubic root of 6423839 is about 185.8937902906.

The spelling of 6423839 in words is "six million, four hundred twenty-three thousand, eight hundred thirty-nine".