6543389 has 2 divisors, whose sum is σ = 6543390. Its totient is φ = 6543388.

The previous prime is 6543377. The next prime is 6543403. The reversal of 6543389 is 9833456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6543364 + 25 = 2558^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 6543389 - 2⁴ = 6543373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6543359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271694 + 3271695.

It is an arithmetic number, because the mean of its divisors is an integer number (3271695).

Almost surely, 2^6543389 is an apocalyptic number.

It is an amenable number.

6543389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543389 is an equidigital number, since it uses as much as digits as its factorization.

6543389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 6543389 is about 2558.0048866255. The cubic root of 6543389 is about 187.0398934972.

The spelling of 6543389 in words is "six million, five hundred forty-three thousand, three hundred eighty-nine".