6939647 has 12 divisors (see below), whose sum is σ = 8199864. Its totient is φ = 5821920.

The previous prime is 6939643. The next prime is 6939649. The reversal of 6939647 is 7469396.

It is not a de Polignac number, because 6939647 - 2² = 6939643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6939598 and 6939607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6939643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8 + ... + 3725.

It is an arithmetic number, because the mean of its divisors is an integer number (683322).

Almost surely, 2^6939647 is an apocalyptic number.

6939647 is a deficient number, since it is larger than the sum of its proper divisors (1260217).

6939647 is a wasteful number, since it uses less digits than its factorization.

6939647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770 (or 3757 counting only the distinct ones).

The product of its digits is 244944, while the sum is 44.

The square root of 6939647 is about 2634.3209751281. The cubic root of 6939647 is about 190.7417633476.

The spelling of 6939647 in words is "six million, nine hundred thirty-nine thousand, six hundred forty-seven".