6945839 has 4 divisors (see below), whose sum is σ = 7247856. Its totient is φ = 6643824.

The previous prime is 6945817. The next prime is 6945857. The reversal of 6945839 is 9385496.

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 6945839 - 2¹² = 6941743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6945839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6945889) 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, 150974 + ... + 151019.

It is an arithmetic number, because the mean of its divisors is an integer number (1811964).

Almost surely, 2^6945839 is an apocalyptic number.

6945839 is a deficient number, since it is larger than the sum of its proper divisors (302017).

6945839 is a wasteful number, since it uses less digits than its factorization.

6945839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302016.

The product of its digits is 233280, while the sum is 44.

The square root of 6945839 is about 2635.4959685038. The cubic root of 6945839 is about 190.7984771783.

The spelling of 6945839 in words is "six million, nine hundred forty-five thousand, eight hundred thirty-nine".