6543659 has 2 divisors, whose sum is σ = 6543660. Its totient is φ = 6543658.

The previous prime is 6543643. The next prime is 6543671. The reversal of 6543659 is 9563456.

6543659 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6543659 - 2⁴ = 6543643 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6543629) 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, 3271829 + 3271830.

It is an arithmetic number, because the mean of its divisors is an integer number (3271830).

Almost surely, 2^6543659 is an apocalyptic number.

6543659 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543659 is an equidigital number, since it uses as much as digits as its factorization.

6543659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 38.

The square root of 6543659 is about 2558.0576615862. The cubic root of 6543659 is about 187.0424660722.

The spelling of 6543659 in words is "six million, five hundred forty-three thousand, six hundred fifty-nine".