80365 has 4 divisors (see below), whose sum is σ = 96444. Its totient is φ = 64288.

The previous prime is 80363. The next prime is 80369. The reversal of 80365 is 56308.

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 21316 + 59049 = 146^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 80365 - 2¹ = 80363 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 a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 80365.

It is not an unprimeable number, because it can be changed into a prime (80363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8032 + ... + 8041.

It is an arithmetic number, because the mean of its divisors is an integer number (24111).

2⁸⁰³⁶⁵ is an apocalyptic number.

It is an amenable number.

80365 is a deficient number, since it is larger than the sum of its proper divisors (16079).

80365 is a wasteful number, since it uses less digits than its factorization.

80365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16078.

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

The square root of 80365 is about 283.4872131155. The cubic root of 80365 is about 43.1541251130.

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

The spelling of 80365 in words is "eighty thousand, three hundred sixty-five".