539309 has 2 divisors, whose sum is σ = 539310. Its totient is φ = 539308.

The previous prime is 539303. The next prime is 539311. The reversal of 539309 is 903935.

539309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299209 + 240100 = 547^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 539309 - 2⁴ = 539293 is a prime.

Together with 539311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (539303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269654 + 269655.

It is an arithmetic number, because the mean of its divisors is an integer number (269655).

2⁵³⁹³⁰⁹ is an apocalyptic number.

It is an amenable number.

539309 is a deficient number, since it is larger than the sum of its proper divisors (1).

539309 is an equidigital number, since it uses as much as digits as its factorization.

539309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 29.

The square root of 539309 is about 734.3766063812. The cubic root of 539309 is about 81.3977791795.

It can be divided in two parts, 539 and 309, that added together give a palindrome (848).

The spelling of 539309 in words is "five hundred thirty-nine thousand, three hundred nine".