6787643 has 2 divisors, whose sum is σ = 6787644. Its totient is φ = 6787642.

The previous prime is 6787639. The next prime is 6787663. The reversal of 6787643 is 3467876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6787643 - 2² = 6787639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6787643.

It is not a weakly prime, because it can be changed into another prime (6787603) 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, 3393821 + 3393822.

It is an arithmetic number, because the mean of its divisors is an integer number (3393822).

Almost surely, 2^6787643 is an apocalyptic number.

6787643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6787643 is an equidigital number, since it uses as much as digits as its factorization.

6787643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 41.

The square root of 6787643 is about 2605.3105381125. The cubic root of 6787643 is about 189.3388190926.

The spelling of 6787643 in words is "six million, seven hundred eighty-seven thousand, six hundred forty-three".