65239 has 2 divisors, whose sum is σ = 65240. Its totient is φ = 65238.

The previous prime is 65213. The next prime is 65257. The reversal of 65239 is 93256.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65239 - 2⁷ = 65111 is a prime.

It is a super-2 number, since 2×65239² = 8512254242, which contains 22 as substring.

It is a plaindrome in base 14.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65269) 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, 32619 + 32620.

It is an arithmetic number, because the mean of its divisors is an integer number (32620).

2⁶⁵²³⁹ is an apocalyptic number.

65239 is a deficient number, since it is larger than the sum of its proper divisors (1).

65239 is an equidigital number, since it uses as much as digits as its factorization.

65239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 25.

The square root of 65239 is about 255.4192631733. The cubic root of 65239 is about 40.2564769742.

The spelling of 65239 in words is "sixty-five thousand, two hundred thirty-nine".