198529 has 2 divisors, whose sum is σ = 198530. Its totient is φ = 198528.

The previous prime is 198503. The next prime is 198533. The reversal of 198529 is 925891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178929 + 19600 = 423^2 + 140^2 .

It is an emirp because it is prime and its reverse (925891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198529 - 2⁹ = 198017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198494 and 198503.

It is not a weakly prime, because it can be changed into another prime (198589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99264 + 99265.

It is an arithmetic number, because the mean of its divisors is an integer number (99265).

2¹⁹⁸⁵²⁹ is an apocalyptic number.

It is an amenable number.

198529 is a deficient number, since it is larger than the sum of its proper divisors (1).

198529 is an equidigital number, since it uses as much as digits as its factorization.

198529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 34.

The square root of 198529 is about 445.5659322704. The cubic root of 198529 is about 58.3366274784.

It can be divided in two parts, 198 and 529, that added together give a palindrome (727).

The spelling of 198529 in words is "one hundred ninety-eight thousand, five hundred twenty-nine".