181489 has 8 divisors (see below), whose sum is σ = 226368. Its totient is φ = 141360.

The previous prime is 181459. The next prime is 181499. The reversal of 181489 is 984181.

181489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 181489 - 2⁵ = 181457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 181489.

It is not an unprimeable number, because it can be changed into a prime (181409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102 + ... + 1255.

It is an arithmetic number, because the mean of its divisors is an integer number (28296).

2¹⁸¹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

181489 is a deficient number, since it is larger than the sum of its proper divisors (44879).

181489 is a wasteful number, since it uses less digits than its factorization.

181489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375.

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

The square root of 181489 is about 426.0152579427. The cubic root of 181489 is about 56.6174235795.

The spelling of 181489 in words is "one hundred eighty-one thousand, four hundred eighty-nine".