198989135 has 8 divisors (see below), whose sum is σ = 238868880. Its totient is φ = 159136704.

The previous prime is 198989107. The next prime is 198989143. The reversal of 198989135 is 531989891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198989135 - 2⁸ = 198988879 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 16379 + ... + 25811.

It is an arithmetic number, because the mean of its divisors is an integer number (29858610).

Almost surely, 2^198989135 is an apocalyptic number.

198989135 is a deficient number, since it is larger than the sum of its proper divisors (39879745).

198989135 is an equidigital number, since it uses as much as digits as its factorization.

198989135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13657.

The product of its digits is 699840, while the sum is 53.

The square root of 198989135 is about 14106.3508746947. The cubic root of 198989135 is about 583.8166206233.

The spelling of 198989135 in words is "one hundred ninety-eight million, nine hundred eighty-nine thousand, one hundred thirty-five".