65969 has 4 divisors (see below), whose sum is σ = 67620. Its totient is φ = 64320.

The previous prime is 65963. The next prime is 65981. The reversal of 65969 is 96956.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35344 + 30625 = 188^2 + 175^2 .

It is a cyclic number.

It is not a de Polignac number, because 65969 - 2⁸ = 65713 is a prime.

It is a super-2 number, since 2×65969² = 8703817922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764 + ... + 845.

It is an arithmetic number, because the mean of its divisors is an integer number (16905).

2⁶⁵⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

65969 is a deficient number, since it is larger than the sum of its proper divisors (1651).

65969 is a wasteful number, since it uses less digits than its factorization.

65969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650.

The product of its digits is 14580, while the sum is 35.

The square root of 65969 is about 256.8443108188. The cubic root of 65969 is about 40.4060720214.

The spelling of 65969 in words is "sixty-five thousand, nine hundred sixty-nine".