198233663 has 4 divisors (see below), whose sum is σ = 198263520. Its totient is φ = 198203808.

The previous prime is 198233653. The next prime is 198233677. The reversal of 198233663 is 366332891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366332891 = 23 ⋅15927517.

It is a cyclic number.

It is not a de Polignac number, because 198233663 - 2¹⁸ = 197971519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198233663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198233603) 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 3 ways as a sum of consecutive naturals, for example, 23 + ... + 19911.

It is an arithmetic number, because the mean of its divisors is an integer number (49565880).

Almost surely, 2^198233663 is an apocalyptic number.

198233663 is a deficient number, since it is larger than the sum of its proper divisors (29857).

198233663 is an equidigital number, since it uses as much as digits as its factorization.

198233663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29856.

The product of its digits is 139968, while the sum is 41.

The square root of 198233663 is about 14079.5476844961. The cubic root of 198233663 is about 583.0768541778.

The spelling of 198233663 in words is "one hundred ninety-eight million, two hundred thirty-three thousand, six hundred sixty-three".