173990 has 16 divisors (see below), whose sum is σ = 317952. Its totient is φ = 68544.

The previous prime is 173981. The next prime is 173993. The reversal of 173990 is 99371.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173993) by changing a digit.

173990 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 7 ways as a sum of consecutive naturals, for example, 1202 + ... + 1338.

It is an arithmetic number, because the mean of its divisors is an integer number (19872).

2¹⁷³⁹⁹⁰ is an apocalyptic number.

173990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

173990 is a deficient number, since it is larger than the sum of its proper divisors (143962).

173990 is a wasteful number, since it uses less digits than its factorization.

173990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 173990 is about 417.1210855375. The cubic root of 173990 is about 55.8266321999.

The spelling of 173990 in words is "one hundred seventy-three thousand, nine hundred ninety".