84981 has 8 divisors (see below), whose sum is σ = 122080. Its totient is φ = 52272.

The previous prime is 84979. The next prime is 84991. The reversal of 84981 is 18948.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84981 - 2¹ = 84979 is a prime.

It is a super-2 number, since 2×84981² = 14443540722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 84981.

It is not an unprimeable number, because it can be changed into a prime (84961) 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 7 ways as a sum of consecutive naturals, for example, 1051 + ... + 1128.

It is an arithmetic number, because the mean of its divisors is an integer number (15260).

2⁸⁴⁹⁸¹ is an apocalyptic number.

It is an amenable number.

84981 is a deficient number, since it is larger than the sum of its proper divisors (37099).

84981 is a wasteful number, since it uses less digits than its factorization.

84981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195.

The product of its digits is 2304, while the sum is 30.

The square root of 84981 is about 291.5150081900. The cubic root of 84981 is about 43.9650204083.

The spelling of 84981 in words is "eighty-four thousand, nine hundred eighty-one".