6786889 has 2 divisors, whose sum is σ = 6786890. Its totient is φ = 6786888.

The previous prime is 6786887. The next prime is 6786917. The reversal of 6786889 is 9886876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 233289 = 2560^2 + 483^2 .

It is a cyclic number.

It is not a de Polignac number, because 6786889 - 2¹ = 6786887 is a prime.

Together with 6786887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6786887) 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, 3393444 + 3393445.

It is an arithmetic number, because the mean of its divisors is an integer number (3393445).

Almost surely, 2^6786889 is an apocalyptic number.

It is an amenable number.

6786889 is a deficient number, since it is larger than the sum of its proper divisors (1).

6786889 is an equidigital number, since it uses as much as digits as its factorization.

6786889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 52.

The square root of 6786889 is about 2605.1658296546. The cubic root of 6786889 is about 189.3318079816.

The spelling of 6786889 in words is "six million, seven hundred eighty-six thousand, eight hundred eighty-nine".