198802663 has 4 divisors (see below), whose sum is σ = 200069080. Its totient is φ = 197536248.

The previous prime is 198802651. The next prime is 198802691. The reversal of 198802663 is 366208891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198802663 - 2¹³ = 198794471 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 (198802603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632973 + ... + 633286.

It is an arithmetic number, because the mean of its divisors is an integer number (50017270).

Almost surely, 2^198802663 is an apocalyptic number.

198802663 is a deficient number, since it is larger than the sum of its proper divisors (1266417).

198802663 is a wasteful number, since it uses less digits than its factorization.

198802663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266416.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 198802663 is about 14099.7398202946. The cubic root of 198802663 is about 583.6341994802.

The spelling of 198802663 in words is "one hundred ninety-eight million, eight hundred two thousand, six hundred sixty-three".