6538549 has 2 divisors, whose sum is σ = 6538550. Its totient is φ = 6538548.

The previous prime is 6538531. The next prime is 6538559. The reversal of 6538549 is 9458356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6160324 + 378225 = 2482^2 + 615^2 .

It is a cyclic number.

It is not a de Polignac number, because 6538549 - 2⁵ = 6538517 is a prime.

6538549 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6538559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3269274 + 3269275.

It is an arithmetic number, because the mean of its divisors is an integer number (3269275).

Almost surely, 2^6538549 is an apocalyptic number.

It is an amenable number.

6538549 is a deficient number, since it is larger than the sum of its proper divisors (1).

6538549 is an equidigital number, since it uses as much as digits as its factorization.

6538549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 6538549 is about 2557.0586618222. The cubic root of 6538549 is about 186.9937656991.

The spelling of 6538549 in words is "six million, five hundred thirty-eight thousand, five hundred forty-nine".