198173 has 2 divisors, whose sum is σ = 198174. Its totient is φ = 198172.

The previous prime is 198139. The next prime is 198179. The reversal of 198173 is 371891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195364 + 2809 = 442^2 + 53^2 .

It is a cyclic number.

It is not a de Polignac number, because 198173 - 2⁶ = 198109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99086 + 99087.

It is an arithmetic number, because the mean of its divisors is an integer number (99087).

2¹⁹⁸¹⁷³ is an apocalyptic number.

It is an amenable number.

198173 is a deficient number, since it is larger than the sum of its proper divisors (1).

198173 is an equidigital number, since it uses as much as digits as its factorization.

198173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 29.

The square root of 198173 is about 445.1662610756. The cubic root of 198173 is about 58.3017370840.

It can be divided in two parts, 19 and 8173, that added together give a 13-th power (8192 = 2¹³).

The spelling of 198173 in words is "one hundred ninety-eight thousand, one hundred seventy-three".