198638153 has 16 divisors (see below), whose sum is σ = 235522560. Its totient is φ = 163987200.

The previous prime is 198638147. The next prime is 198638201. The reversal of 198638153 is 351836891.

It is a cyclic number.

It is not a de Polignac number, because 198638153 - 2²⁰ = 197589577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198638123) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 18293 + ... + 27053.

It is an arithmetic number, because the mean of its divisors is an integer number (14720160).

Almost surely, 2^198638153 is an apocalyptic number.

It is an amenable number.

198638153 is a deficient number, since it is larger than the sum of its proper divisors (36884407).

198638153 is an equidigital number, since it uses as much as digits as its factorization.

198638153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8888.

The product of its digits is 155520, while the sum is 44.

The square root of 198638153 is about 14093.9048173315. The cubic root of 198638153 is about 583.4731685081.

The spelling of 198638153 in words is "one hundred ninety-eight million, six hundred thirty-eight thousand, one hundred fifty-three".