198943503 has 32 divisors (see below), whose sum is σ = 312221952. Its totient is φ = 111321600.

The previous prime is 198943501. The next prime is 198943513. The reversal of 198943503 is 305349891.

It is not a de Polignac number, because 198943503 - 2¹ = 198943501 is a prime.

It is a super-2 number, since 2×198943503² = 79157034771822018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198943501) 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 31 ways as a sum of consecutive naturals, for example, 26388 + ... + 33078.

It is an arithmetic number, because the mean of its divisors is an integer number (9756936).

Almost surely, 2^198943503 is an apocalyptic number.

198943503 is a deficient number, since it is larger than the sum of its proper divisors (113278449).

198943503 is a wasteful number, since it uses less digits than its factorization.

198943503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6775.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 198943503 is about 14104.7333544452. The cubic root of 198943503 is about 583.7719904534.

The spelling of 198943503 in words is "one hundred ninety-eight million, nine hundred forty-three thousand, five hundred three".