6544739 has 2 divisors, whose sum is σ = 6544740. Its totient is φ = 6544738.

The previous prime is 6544667. The next prime is 6544753. The reversal of 6544739 is 9374456.

6544739 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 6544739 - 2¹² = 6540643 is a prime.

It is not a weakly prime, because it can be changed into another prime (6544039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3272369 + 3272370.

It is an arithmetic number, because the mean of its divisors is an integer number (3272370).

Almost surely, 2^6544739 is an apocalyptic number.

6544739 is a deficient number, since it is larger than the sum of its proper divisors (1).

6544739 is an equidigital number, since it uses as much as digits as its factorization.

6544739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 6544739 is about 2558.2687505421. The cubic root of 6544739 is about 187.0527556645.

The spelling of 6544739 in words is "six million, five hundred forty-four thousand, seven hundred thirty-nine".