80965 has 4 divisors (see below), whose sum is σ = 97164. Its totient is φ = 64768.

The previous prime is 80963. The next prime is 80989. The reversal of 80965 is 56908.

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 60516 + 20449 = 246^2 + 143^2 .

It is a cyclic number.

It is not a de Polignac number, because 80965 - 2¹ = 80963 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80963) 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, 8092 + ... + 8101.

It is an arithmetic number, because the mean of its divisors is an integer number (24291).

2⁸⁰⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

80965 is a deficient number, since it is larger than the sum of its proper divisors (16199).

80965 is a wasteful number, since it uses less digits than its factorization.

80965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16198.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 80965 is about 284.5434940391. The cubic root of 80965 is about 43.2612542688.

The spelling of 80965 in words is "eighty thousand, nine hundred sixty-five".