181673 has 4 divisors (see below), whose sum is σ = 183120. Its totient is φ = 180228.

The previous prime is 181669. The next prime is 181693. The reversal of 181673 is 376181.

181673 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 181673 - 2² = 181669 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181603) 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, 515 + ... + 792.

It is an arithmetic number, because the mean of its divisors is an integer number (45780).

2¹⁸¹⁶⁷³ is an apocalyptic number.

It is an amenable number.

181673 is a deficient number, since it is larger than the sum of its proper divisors (1447).

181673 is a wasteful number, since it uses less digits than its factorization.

181673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446.

The product of its digits is 1008, while the sum is 26.

The square root of 181673 is about 426.2311579413. The cubic root of 181673 is about 56.6365507026.

The spelling of 181673 in words is "one hundred eighty-one thousand, six hundred seventy-three".