6879643 has 2 divisors, whose sum is σ = 6879644. Its totient is φ = 6879642.

The previous prime is 6879589. The next prime is 6879661. The reversal of 6879643 is 3469786.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6879643 - 2¹⁷ = 6748571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6879643.

It is not a weakly prime, because it can be changed into another prime (6879673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3439821 + 3439822.

It is an arithmetic number, because the mean of its divisors is an integer number (3439822).

Almost surely, 2^6879643 is an apocalyptic number.

6879643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6879643 is an equidigital number, since it uses as much as digits as its factorization.

6879643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 6879643 is about 2622.9073563510. The cubic root of 6879643 is about 190.1904185166.

The spelling of 6879643 in words is "six million, eight hundred seventy-nine thousand, six hundred forty-three".