189481 has 4 divisors (see below), whose sum is σ = 191700. Its totient is φ = 187264.

The previous prime is 189479. The next prime is 189491. The reversal of 189481 is 184981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184981 = 113 ⋅1637.

It can be written as a sum of positive squares in 2 ways, for example, as 42025 + 147456 = 205^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 189481 - 2¹ = 189479 is a prime.

It is a super-2 number, since 2×189481² = 71806098722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189401) 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, 976 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (47925).

2¹⁸⁹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

189481 is a deficient number, since it is larger than the sum of its proper divisors (2219).

189481 is an equidigital number, since it uses as much as digits as its factorization.

189481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218.

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

The square root of 189481 is about 435.2941534181. The cubic root of 189481 is about 57.4365778345.

It can be divided in two parts, 189 and 481, that multiplied together give a palindrome (90909).

The spelling of 189481 in words is "one hundred eighty-nine thousand, four hundred eighty-one".