6775987 has 2 divisors, whose sum is σ = 6775988. Its totient is φ = 6775986.

The previous prime is 6775981. The next prime is 6776009. The reversal of 6775987 is 7895776.

6775987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6775987 is a prime.

It is a super-3 number, since 3×6775987³ (a number of 21 digits) contains 333 as substring.

6775987 is a lucky number.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 6775987.

It is not a weakly prime, because it can be changed into another prime (6775981) 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, 3387993 + 3387994.

It is an arithmetic number, because the mean of its divisors is an integer number (3387994).

Almost surely, 2^6775987 is an apocalyptic number.

6775987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6775987 is an equidigital number, since it uses as much as digits as its factorization.

6775987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740880, while the sum is 49.

The square root of 6775987 is about 2603.0726075160. The cubic root of 6775987 is about 189.2303770429.

The spelling of 6775987 in words is "six million, seven hundred seventy-five thousand, nine hundred eighty-seven".