6878647 has 2 divisors, whose sum is σ = 6878648. Its totient is φ = 6878646.

The previous prime is 6878639. The next prime is 6878657. The reversal of 6878647 is 7468786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6878647 - 2³ = 6878639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6878597 and 6878606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6878617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3439323 + 3439324.

It is an arithmetic number, because the mean of its divisors is an integer number (3439324).

Almost surely, 2^6878647 is an apocalyptic number.

6878647 is a deficient number, since it is larger than the sum of its proper divisors (1).

6878647 is an equidigital number, since it uses as much as digits as its factorization.

6878647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 46.

The square root of 6878647 is about 2622.7174838324. The cubic root of 6878647 is about 190.1812398039.

The spelling of 6878647 in words is "six million, eight hundred seventy-eight thousand, six hundred forty-seven".