6839959 has 6 divisors (see below), whose sum is σ = 7956744. Its totient is φ = 5862780.

The previous prime is 6839939. The next prime is 6839971. The reversal of 6839959 is 9599386.

It is not a de Polignac number, because 6839959 - 2¹³ = 6831767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 139591 = 6839959 / (6 + 8 + 3 + 9 + 9 + 5 + 9).

It is a Duffinian number.

6839959 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6839939) 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 5 ways as a sum of consecutive naturals, for example, 69747 + ... + 69844.

It is an arithmetic number, because the mean of its divisors is an integer number (1326124).

Almost surely, 2^6839959 is an apocalyptic number.

6839959 is a deficient number, since it is larger than the sum of its proper divisors (1116785).

6839959 is a wasteful number, since it uses less digits than its factorization.

6839959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139605 (or 139598 counting only the distinct ones).

The product of its digits is 524880, while the sum is 49.

The square root of 6839959 is about 2615.3315277418. The cubic root of 6839959 is about 189.8240198811.

The spelling of 6839959 in words is "six million, eight hundred thirty-nine thousand, nine hundred fifty-nine".