184981 has 4 divisors (see below), whose sum is σ = 186732. Its totient is φ = 183232.

The previous prime is 184969. The next prime is 184993. The reversal of 184981 is 189481.

184981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 189481 = 89 ⋅2129.

It is an interprime number because it is at equal distance from previous prime (184969) and next prime (184993).

It can be written as a sum of positive squares in 2 ways, for example, as 4356 + 180625 = 66^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 184981 - 2⁵ = 184949 is a prime.

It is a super-2 number, since 2×184981² = 68435940722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (184901) 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, 706 + ... + 931.

It is an arithmetic number, because the mean of its divisors is an integer number (46683).

2¹⁸⁴⁹⁸¹ is an apocalyptic number.

It is an amenable number.

184981 is a deficient number, since it is larger than the sum of its proper divisors (1751).

184981 is a wasteful number, since it uses less digits than its factorization.

184981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750.

The product of its digits is 2304, while the sum is 31.

The square root of 184981 is about 430.0941757336. The cubic root of 184981 is about 56.9782414130.

It can be divided in two parts, 1849 and 81, that multiplied together give a square (149769 = 387²).

The spelling of 184981 in words is "one hundred eighty-four thousand, nine hundred eighty-one".