181373 has 8 divisors (see below), whose sum is σ = 196992. Its totient is φ = 166336.

The previous prime is 181361. The next prime is 181387. The reversal of 181373 is 373181.

It is a happy number.

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 181373 - 2¹⁶ = 115837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181303) 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, 686 + ... + 912.

It is an arithmetic number, because the mean of its divisors is an integer number (24624).

2¹⁸¹³⁷³ is an apocalyptic number.

It is an amenable number.

181373 is a deficient number, since it is larger than the sum of its proper divisors (15619).

181373 is a wasteful number, since it uses less digits than its factorization.

181373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291.

The product of its digits is 504, while the sum is 23.

The square root of 181373 is about 425.8790908227. The cubic root of 181373 is about 56.6053585307.

The spelling of 181373 in words is "one hundred eighty-one thousand, three hundred seventy-three".