198125569 has 4 divisors (see below), whose sum is σ = 198159444. Its totient is φ = 198091696.

The previous prime is 198125567. The next prime is 198125573. The reversal of 198125569 is 965521891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 965521891 = 109 ⋅8857999.

It can be written as a sum of positive squares in 2 ways, for example, as 138650625 + 59474944 = 11775^2 + 7712^2 .

It is a cyclic number.

It is not a de Polignac number, because 198125569 - 2¹ = 198125567 is a prime.

It is a super-3 number, since 3×198125569³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198125563) 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, 5662 + ... + 20695.

It is an arithmetic number, because the mean of its divisors is an integer number (49539861).

Almost surely, 2^198125569 is an apocalyptic number.

It is an amenable number.

198125569 is a deficient number, since it is larger than the sum of its proper divisors (33875).

198125569 is an equidigital number, since it uses as much as digits as its factorization.

198125569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33874.

The product of its digits is 194400, while the sum is 46.

The square root of 198125569 is about 14075.7084724002. The cubic root of 198125569 is about 582.9708537339.

The spelling of 198125569 in words is "one hundred ninety-eight million, one hundred twenty-five thousand, five hundred sixty-nine".