198333913 has 4 divisors (see below), whose sum is σ = 208772560. Its totient is φ = 187895268.

The previous prime is 198333859. The next prime is 198333943. The reversal of 198333913 is 319333891.

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 a de Polignac number, because none of the positive numbers 2^k-198333913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198333943) 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, 5219295 + ... + 5219332.

It is an arithmetic number, because the mean of its divisors is an integer number (52193140).

Almost surely, 2^198333913 is an apocalyptic number.

It is an amenable number.

198333913 is a deficient number, since it is larger than the sum of its proper divisors (10438647).

198333913 is a wasteful number, since it uses less digits than its factorization.

198333913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10438646.

The product of its digits is 52488, while the sum is 40.

The square root of 198333913 is about 14083.1073630786. The cubic root of 198333913 is about 583.1751281085.

The spelling of 198333913 in words is "one hundred ninety-eight million, three hundred thirty-three thousand, nine hundred thirteen".