198539513 has 4 divisors (see below), whose sum is σ = 198631680. Its totient is φ = 198447348.

The previous prime is 198539491. The next prime is 198539527. The reversal of 198539513 is 315935891.

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, and also an emirpimes, since its reverse is a distinct semiprime: 315935891 = 163 ⋅1938257.

It is a cyclic number.

It is not a de Polignac number, because 198539513 - 2¹⁰ = 198538489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198539563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42773 + ... + 47186.

It is an arithmetic number, because the mean of its divisors is an integer number (49657920).

Almost surely, 2^198539513 is an apocalyptic number.

It is an amenable number.

198539513 is a deficient number, since it is larger than the sum of its proper divisors (92167).

198539513 is an equidigital number, since it uses as much as digits as its factorization.

198539513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92166.

The product of its digits is 145800, while the sum is 44.

The square root of 198539513 is about 14090.4049977281. The cubic root of 198539513 is about 583.3765718879.

The spelling of 198539513 in words is "one hundred ninety-eight million, five hundred thirty-nine thousand, five hundred thirteen".