173906 has 8 divisors (see below), whose sum is σ = 264060. Its totient is φ = 85888.

The previous prime is 173897. The next prime is 173909. The reversal of 173906 is 609371.

It is a happy number.

173906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 172225 + 1681 = 415^2 + 41^2 .

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

It is a Curzon number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (173909) by changing a digit.

173906 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311 + ... + 666.

2¹⁷³⁹⁰⁶ is an apocalyptic number.

173906 is a deficient number, since it is larger than the sum of its proper divisors (90154).

173906 is an equidigital number, since it uses as much as digits as its factorization.

173906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 173906 is about 417.0203831949. The cubic root of 173906 is about 55.8176466414.

The spelling of 173906 in words is "one hundred seventy-three thousand, nine hundred six".