65889 has 6 divisors (see below), whose sum is σ = 95186. Its totient is φ = 43920.

The previous prime is 65881. The next prime is 65899. The reversal of 65889 is 98856.

It can be written as a sum of positive squares in only one way, i.e., 33489 + 32400 = 183^2 + 180^2 .

It is not a de Polignac number, because 65889 - 2³ = 65881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3652 + ... + 3669.

2⁶⁵⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

65889 is a deficient number, since it is larger than the sum of its proper divisors (29297).

65889 is a wasteful number, since it uses less digits than its factorization.

65889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7327 (or 7324 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 65889 is about 256.6885272076. The cubic root of 65889 is about 40.3897320571.

It can be divided in two parts, 658 and 89, that added together give a palindrome (747).

The spelling of 65889 in words is "sixty-five thousand, eight hundred eighty-nine".