198936793 has 4 divisors (see below), whose sum is σ = 217021968. Its totient is φ = 180851620.

The previous prime is 198936769. The next prime is 198936809. The reversal of 198936793 is 397639891.

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 198936793 - 2⁹ = 198936281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198936763) 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, 9042571 + ... + 9042592.

It is an arithmetic number, because the mean of its divisors is an integer number (54255492).

Almost surely, 2^198936793 is an apocalyptic number.

It is an amenable number.

198936793 is a deficient number, since it is larger than the sum of its proper divisors (18085175).

198936793 is a wasteful number, since it uses less digits than its factorization.

198936793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18085174.

The product of its digits is 2204496, while the sum is 55.

The square root of 198936793 is about 14104.4954890276. The cubic root of 198936793 is about 583.7654271929.

The spelling of 198936793 in words is "one hundred ninety-eight million, nine hundred thirty-six thousand, seven hundred ninety-three".