84547 has 4 divisors (see below), whose sum is σ = 86040. Its totient is φ = 83056.

The previous prime is 84533. The next prime is 84551. The reversal of 84547 is 74548.

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

It is a cyclic number.

It is not a de Polignac number, because 84547 - 2¹¹ = 82499 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658 + ... + 775.

It is an arithmetic number, because the mean of its divisors is an integer number (21510).

2⁸⁴⁵⁴⁷ is an apocalyptic number.

84547 is a deficient number, since it is larger than the sum of its proper divisors (1493).

84547 is a wasteful number, since it uses less digits than its factorization.

84547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492.

The product of its digits is 4480, while the sum is 28.

The square root of 84547 is about 290.7696682943. The cubic root of 84547 is about 43.8900491661.

Subtracting from 84547 its reverse (74548), we obtain a palindrome (9999).

The spelling of 84547 in words is "eighty-four thousand, five hundred forty-seven".