65539 has 2 divisors, whose sum is σ = 65540.
Its totient is φ = 65538.
The previous prime is 65537. The next prime is 65543. The reversal of 65539 is 93556.
65539 = 1022 + 1032 + ... + 1072.
It is a happy number.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 65539 - 21 = 65537 is a prime.
Together with 65537, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (65537) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (3) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32769 + 32770.
It is an arithmetic number, because the mean of its divisors is an integer number (32770).
265539 is an apocalyptic number.
65539 is a deficient number, since it is larger than the sum of its proper divisors (1).
65539 is an equidigital number, since it uses as much as digits as its factorization.
65539 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 4050, while the sum is 28.
The square root of 65539 is about 256.0058593079.
The cubic root of 65539 is about 40.3180887831.
The spelling of 65539 in words is "sixty-five thousand, five hundred thirty-nine".