6878239 has 4 divisors (see below), whose sum is σ = 6904656. Its totient is φ = 6851824.

The previous prime is 6878233. The next prime is 6878269. The reversal of 6878239 is 9328786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9328786 = 2 ⋅4664393.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6878239 is a prime.

It is a super-2 number, since 2×6878239² = 94620343482242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6878195 and 6878204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6878233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12814 + ... + 13339.

It is an arithmetic number, because the mean of its divisors is an integer number (1726164).

Almost surely, 2^6878239 is an apocalyptic number.

6878239 is a deficient number, since it is larger than the sum of its proper divisors (26417).

6878239 is a wasteful number, since it uses less digits than its factorization.

6878239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26416.

The product of its digits is 145152, while the sum is 43.

The square root of 6878239 is about 2622.6397007595. The cubic root of 6878239 is about 190.1774795935.

It can be divided in two parts, 6878 and 239, that added together give a palindrome (7117).

The spelling of 6878239 in words is "six million, eight hundred seventy-eight thousand, two hundred thirty-nine".