84831 has 4 divisors (see below), whose sum is σ = 113112. Its totient is φ = 56552.

The previous prime is 84827. The next prime is 84857. The reversal of 84831 is 13848.

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 84831 - 2² = 84827 is a prime.

It is a super-2 number, since 2×84831² = 14392597122, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84811) 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 3 ways as a sum of consecutive naturals, for example, 14136 + ... + 14141.

It is an arithmetic number, because the mean of its divisors is an integer number (28278).

2⁸⁴⁸³¹ is an apocalyptic number.

84831 is a deficient number, since it is larger than the sum of its proper divisors (28281).

84831 is a wasteful number, since it uses less digits than its factorization.

84831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28280.

The product of its digits is 768, while the sum is 24.

The square root of 84831 is about 291.2576179261. The cubic root of 84831 is about 43.9391376149.

The spelling of 84831 in words is "eighty-four thousand, eight hundred thirty-one".