65719 has 2 divisors, whose sum is σ = 65720.
Its totient is φ = 65718.
The previous prime is 65717. The next prime is 65729. The reversal of 65719 is 91756.
It is a happy number.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 65719 - 21 = 65717 is a prime.
It is a super-2 number, since 2×657192 = 8637973922, which contains 22 as substring.
Together with 65717, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (65713) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32859 + 32860.
It is an arithmetic number, because the mean of its divisors is an integer number (32860).
265719 is an apocalyptic number.
65719 is a deficient number, since it is larger than the sum of its proper divisors (1).
65719 is an equidigital number, since it uses as much as digits as its factorization.
65719 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1890, while the sum is 28.
The square root of 65719 is about 256.3571727103.
The cubic root of 65719 is about 40.3549656665.
It can be divided in two parts, 657 and 19, that added together give a palindrome (676).
The spelling of 65719 in words is "sixty-five thousand, seven hundred nineteen".