80945 has 4 divisors (see below), whose sum is σ = 97140. Its totient is φ = 64752.

The previous prime is 80933. The next prime is 80953. The reversal of 80945 is 54908.

80945 is nontrivially palindromic in base 16.

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 33856 + 47089 = 184^2 + 217^2 .

It is a cyclic number.

It is not a de Polignac number, because 80945 - 2⁴ = 80929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8090 + ... + 8099.

It is an arithmetic number, because the mean of its divisors is an integer number (24285).

2⁸⁰⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

80945 is a deficient number, since it is larger than the sum of its proper divisors (16195).

80945 is a wasteful number, since it uses less digits than its factorization.

80945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16194.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 80945 is about 284.5083478564. The cubic root of 80945 is about 43.2576918392.

It can be divided in two parts, 8094 and 5, that multiplied together give a triangular number (40470 = T₂₈₄).

The spelling of 80945 in words is "eighty thousand, nine hundred forty-five".