198813517 has 4 divisors (see below), whose sum is σ = 227215456. Its totient is φ = 170411580.

The previous prime is 198813499. The next prime is 198813577. The reversal of 198813517 is 715318891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198813517 - 2⁷ = 198813389 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 (198813577) 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, 14200959 + ... + 14200972.

It is an arithmetic number, because the mean of its divisors is an integer number (56803864).

Almost surely, 2^198813517 is an apocalyptic number.

It is an amenable number.

198813517 is a deficient number, since it is larger than the sum of its proper divisors (28401939).

198813517 is an equidigital number, since it uses as much as digits as its factorization.

198813517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28401938.

The product of its digits is 60480, while the sum is 43.

The square root of 198813517 is about 14100.1247157605. The cubic root of 198813517 is about 583.6448208174.

The spelling of 198813517 in words is "one hundred ninety-eight million, eight hundred thirteen thousand, five hundred seventeen".