84445 has 4 divisors (see below), whose sum is σ = 101340. Its totient is φ = 67552.

The previous prime is 84443. The next prime is 84449. The reversal of 84445 is 54448.

84445 is nontrivially palindromic in base 6.

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 13689 + 70756 = 117^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 84445 - 2¹ = 84443 is a prime.

It is a plaindrome in base 14 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84443) 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, 8440 + ... + 8449.

It is an arithmetic number, because the mean of its divisors is an integer number (25335).

2⁸⁴⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

84445 is a deficient number, since it is larger than the sum of its proper divisors (16895).

84445 is a wasteful number, since it uses less digits than its factorization.

84445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16894.

The product of its digits is 2560, while the sum is 25.

The square root of 84445 is about 290.5942188000. The cubic root of 84445 is about 43.8723919792.

It can be divided in two parts, 84 and 445, that added together give a square (529 = 23²).

The spelling of 84445 in words is "eighty-four thousand, four hundred forty-five".