6878917 has 2 divisors, whose sum is σ = 6878918. Its totient is φ = 6878916.

The previous prime is 6878903. The next prime is 6878951. The reversal of 6878917 is 7198786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5692996 + 1185921 = 2386^2 + 1089^2 .

It is a cyclic number.

It is not a de Polignac number, because 6878917 - 2⁷ = 6878789 is a prime.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3439458 + 3439459.

It is an arithmetic number, because the mean of its divisors is an integer number (3439459).

Almost surely, 2^6878917 is an apocalyptic number.

It is an amenable number.

6878917 is a deficient number, since it is larger than the sum of its proper divisors (1).

6878917 is an equidigital number, since it uses as much as digits as its factorization.

6878917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 46.

The square root of 6878917 is about 2622.7689566563. The cubic root of 6878917 is about 190.1837280967.

It can be divided in two parts, 687 and 8917, that added together give a square (9604 = 98²).

The spelling of 6878917 in words is "six million, eight hundred seventy-eight thousand, nine hundred seventeen".