198744967 has 4 divisors (see below), whose sum is σ = 200310016. Its totient is φ = 197179920.

The previous prime is 198744919. The next prime is 198744979. The reversal of 198744967 is 769447891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198744967 - 2¹⁹ = 198220679 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 (198744907) 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, 782334 + ... + 782587.

It is an arithmetic number, because the mean of its divisors is an integer number (50077504).

Almost surely, 2^198744967 is an apocalyptic number.

198744967 is a deficient number, since it is larger than the sum of its proper divisors (1565049).

198744967 is a wasteful number, since it uses less digits than its factorization.

198744967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565048.

The product of its digits is 3048192, while the sum is 55.

The square root of 198744967 is about 14097.6936766267. The cubic root of 198744967 is about 583.5777337429.

The spelling of 198744967 in words is "one hundred ninety-eight million, seven hundred forty-four thousand, nine hundred sixty-seven".