13539749 has 2 divisors, whose sum is σ = 13539750. Its totient is φ = 13539748.

The previous prime is 13539737. The next prime is 13539763. The reversal of 13539749 is 94793531.

13539749 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11607649 + 1932100 = 3407^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 13539749 - 2¹⁶ = 13474213 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (13539719) 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, 6769874 + 6769875.

It is an arithmetic number, because the mean of its divisors is an integer number (6769875).

Almost surely, 2^13539749 is an apocalyptic number.

It is an amenable number.

13539749 is a deficient number, since it is larger than the sum of its proper divisors (1).

13539749 is an equidigital number, since it uses as much as digits as its factorization.

13539749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 41.

The square root of 13539749 is about 3679.6397921536. The cubic root of 13539749 is about 238.3436236395.

The spelling of 13539749 in words is "thirteen million, five hundred thirty-nine thousand, seven hundred forty-nine".