6785591 has 2 divisors, whose sum is σ = 6785592. Its totient is φ = 6785590.

The previous prime is 6785573. The next prime is 6785593. The reversal of 6785591 is 1955876.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6785591 is a prime.

It is a Sophie Germain prime.

Together with 6785593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6785593) 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, 3392795 + 3392796.

It is an arithmetic number, because the mean of its divisors is an integer number (3392796).

Almost surely, 2^6785591 is an apocalyptic number.

6785591 is a deficient number, since it is larger than the sum of its proper divisors (1).

6785591 is an equidigital number, since it uses as much as digits as its factorization.

6785591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 41.

The square root of 6785591 is about 2604.9166973245. The cubic root of 6785591 is about 189.3197372398.

It can be divided in two parts, 67 and 85591, that added together give a palindrome (85658).

The spelling of 6785591 in words is "six million, seven hundred eighty-five thousand, five hundred ninety-one".