173887 has 4 divisors (see below), whose sum is σ = 198736. Its totient is φ = 149040.

The previous prime is 173867. The next prime is 173891. The reversal of 173887 is 788371.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173887 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 (173807) 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, 12414 + ... + 12427.

It is an arithmetic number, because the mean of its divisors is an integer number (49684).

2¹⁷³⁸⁸⁷ is an apocalyptic number.

173887 is a deficient number, since it is larger than the sum of its proper divisors (24849).

173887 is an equidigital number, since it uses as much as digits as its factorization.

173887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24848.

The product of its digits is 9408, while the sum is 34.

The square root of 173887 is about 416.9976019116. The cubic root of 173887 is about 55.8156137924.

The spelling of 173887 in words is "one hundred seventy-three thousand, eight hundred eighty-seven".