173881 has 4 divisors (see below), whose sum is σ = 178164. Its totient is φ = 169600.

The previous prime is 173867. The next prime is 173891. The reversal of 173881 is 188371.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188371 = 113 ⋅1667.

It can be written as a sum of positive squares in 2 ways, for example, as 95481 + 78400 = 309^2 + 280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173881 is a prime.

It is a super-2 number, since 2×173881² = 60469204322, 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 (173851) 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, 2080 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (44541).

2¹⁷³⁸⁸¹ is an apocalyptic number.

It is an amenable number.

173881 is a deficient number, since it is larger than the sum of its proper divisors (4283).

173881 is an equidigital number, since it uses as much as digits as its factorization.

173881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282.

The product of its digits is 1344, while the sum is 28.

The square root of 173881 is about 416.9904075635. The cubic root of 173881 is about 55.8149718093.

The spelling of 173881 in words is "one hundred seventy-three thousand, eight hundred eighty-one".