65803 has 4 divisors (see below), whose sum is σ = 68688. Its totient is φ = 62920.

The previous prime is 65789. The next prime is 65809. The reversal of 65803 is 30856.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65803 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

65803 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (65809) 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 3 ways as a sum of consecutive naturals, for example, 1408 + ... + 1453.

It is an arithmetic number, because the mean of its divisors is an integer number (17172).

2⁶⁵⁸⁰³ is an apocalyptic number.

65803 is a deficient number, since it is larger than the sum of its proper divisors (2885).

65803 is a wasteful number, since it uses less digits than its factorization.

65803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 65803 is about 256.5209543098. The cubic root of 65803 is about 40.3721518374.

It can be divided in two parts, 65 and 803, that added together give a palindrome (868).

The spelling of 65803 in words is "sixty-five thousand, eight hundred three".