84847 has 16 divisors (see below), whose sum is σ = 110592. Its totient is φ = 63360.

The previous prime is 84827. The next prime is 84857. The reversal of 84847 is 74848.

It is a cyclic number.

It is not a de Polignac number, because 84847 - 2⁷ = 84719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an Ulam number.

It is a Duffinian number.

84847 is a lucky number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84827) 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 15 ways as a sum of consecutive naturals, for example, 2722 + ... + 2752.

It is an arithmetic number, because the mean of its divisors is an integer number (6912).

2⁸⁴⁸⁴⁷ is an apocalyptic number.

84847 is the 238-th pentagonal number.

84847 is a deficient number, since it is larger than the sum of its proper divisors (25745).

84847 is a wasteful number, since it uses less digits than its factorization.

84847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78.

The product of its digits is 7168, while the sum is 31.

The square root of 84847 is about 291.2850837238. The cubic root of 84847 is about 43.9418998991.

Subtracting from 84847 its reverse (74848), we obtain a palindrome (9999).

The spelling of 84847 in words is "eighty-four thousand, eight hundred forty-seven".