198290135 has 4 divisors (see below), whose sum is σ = 237948168. Its totient is φ = 158632104.

The previous prime is 198290129. The next prime is 198290161. The reversal of 198290135 is 531092891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198290135 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19829009 + ... + 19829018.

It is an arithmetic number, because the mean of its divisors is an integer number (59487042).

Almost surely, 2^198290135 is an apocalyptic number.

198290135 is a deficient number, since it is larger than the sum of its proper divisors (39658033).

198290135 is an equidigital number, since it uses as much as digits as its factorization.

198290135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39658032.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 198290135 is about 14081.5530038416. The cubic root of 198290135 is about 583.1322171089.

The spelling of 198290135 in words is "one hundred ninety-eight million, two hundred ninety thousand, one hundred thirty-five".