198388263 has 8 divisors (see below), whose sum is σ = 264589168. Its totient is φ = 132223104.

The previous prime is 198388241. The next prime is 198388277. The reversal of 198388263 is 362883891.

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

It is not a de Polignac number, because 198388263 - 2⁹ = 198387751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198388213) 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, 9381 + ... + 22017.

It is an arithmetic number, because the mean of its divisors is an integer number (33073646).

Almost surely, 2^198388263 is an apocalyptic number.

198388263 is a deficient number, since it is larger than the sum of its proper divisors (66200905).

198388263 is a wasteful number, since it uses less digits than its factorization.

198388263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17873.

The product of its digits is 497664, while the sum is 48.

The square root of 198388263 is about 14085.0368476621. The cubic root of 198388263 is about 583.2283929503.

The spelling of 198388263 in words is "one hundred ninety-eight million, three hundred eighty-eight thousand, two hundred sixty-three".