6788689 has 2 divisors, whose sum is σ = 6788690. Its totient is φ = 6788688.

The previous prime is 6788687. The next prime is 6788699. The reversal of 6788689 is 9868876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6718464 + 70225 = 2592^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 6788689 - 2¹ = 6788687 is a prime.

Together with 6788687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6788687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3394344 + 3394345.

It is an arithmetic number, because the mean of its divisors is an integer number (3394345).

Almost surely, 2^6788689 is an apocalyptic number.

It is an amenable number.

6788689 is a deficient number, since it is larger than the sum of its proper divisors (1).

6788689 is an equidigital number, since it uses as much as digits as its factorization.

6788689 is an evil number, because the sum of its binary digits is even.

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

The square root of 6788689 is about 2605.5112742032. The cubic root of 6788689 is about 189.3485445222.

The spelling of 6788689 in words is "six million, seven hundred eighty-eight thousand, six hundred eighty-nine".