6878491 has 2 divisors, whose sum is σ = 6878492. Its totient is φ = 6878490.

The previous prime is 6878479. The next prime is 6878519. The reversal of 6878491 is 1948786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6878491 - 2⁷ = 6878363 is a prime.

It is not a weakly prime, because it can be changed into another prime (6878401) 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, 3439245 + 3439246.

It is an arithmetic number, because the mean of its divisors is an integer number (3439246).

Almost surely, 2^6878491 is an apocalyptic number.

6878491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6878491 is an equidigital number, since it uses as much as digits as its factorization.

6878491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 6878491 is about 2622.6877435181. The cubic root of 6878491 is about 190.1798020940.

The spelling of 6878491 in words is "six million, eight hundred seventy-eight thousand, four hundred ninety-one".