198618249 has 8 divisors (see below), whose sum is σ = 269313120. Its totient is φ = 130167776.

The previous prime is 198618223. The next prime is 198618263. The reversal of 198618249 is 942816891.

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 198618249 - 2⁹ = 198617737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198618198 and 198618207.

It is not an unprimeable number, because it can be changed into a prime (198618349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560892 + ... + 561245.

It is an arithmetic number, because the mean of its divisors is an integer number (33664140).

Almost surely, 2^198618249 is an apocalyptic number.

It is an amenable number.

198618249 is a deficient number, since it is larger than the sum of its proper divisors (70694871).

198618249 is a wasteful number, since it uses less digits than its factorization.

198618249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122199.

The product of its digits is 248832, while the sum is 48.

The square root of 198618249 is about 14093.1986787954. The cubic root of 198618249 is about 583.4536794058.

The spelling of 198618249 in words is "one hundred ninety-eight million, six hundred eighteen thousand, two hundred forty-nine".