198168533 has 4 divisors (see below), whose sum is σ = 198210048. Its totient is φ = 198127020.

The previous prime is 198168521. The next prime is 198168563. The reversal of 198168533 is 335861891.

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: 335861891 = 577 ⋅582083.

It is a cyclic number.

It is not a de Polignac number, because 198168533 - 2¹⁰ = 198167509 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 (198168563) 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, 12503 + ... + 23508.

It is an arithmetic number, because the mean of its divisors is an integer number (49552512).

Almost surely, 2^198168533 is an apocalyptic number.

It is an amenable number.

198168533 is a deficient number, since it is larger than the sum of its proper divisors (41515).

198168533 is an equidigital number, since it uses as much as digits as its factorization.

198168533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41514.

The product of its digits is 155520, while the sum is 44.

The square root of 198168533 is about 14077.2345650699. The cubic root of 198168533 is about 583.0129902261.

The spelling of 198168533 in words is "one hundred ninety-eight million, one hundred sixty-eight thousand, five hundred thirty-three".