6540949 has 2 divisors, whose sum is σ = 6540950. Its totient is φ = 6540948.

The previous prime is 6540913. The next prime is 6540953. The reversal of 6540949 is 9490456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6036849 + 504100 = 2457^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 6540949 - 2¹⁵ = 6508181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6520949) 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, 3270474 + 3270475.

It is an arithmetic number, because the mean of its divisors is an integer number (3270475).

Almost surely, 2^6540949 is an apocalyptic number.

It is an amenable number.

6540949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6540949 is an equidigital number, since it uses as much as digits as its factorization.

6540949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 6540949 is about 2557.5279079611. The cubic root of 6540949 is about 187.0166418316.

It can be divided in two parts, 65 and 40949, that added together give a palindrome (41014).

The spelling of 6540949 in words is "six million, five hundred forty thousand, nine hundred forty-nine".