198444931 has 4 divisors (see below), whose sum is σ = 199633392. Its totient is φ = 197256472.

The previous prime is 198444923. The next prime is 198444937. The reversal of 198444931 is 139444891.

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 198444931 - 2³ = 198444923 is a prime.

It is a super-2 number, since 2×198444931² = 78760781279189522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198444937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593980 + ... + 594313.

It is an arithmetic number, because the mean of its divisors is an integer number (49908348).

Almost surely, 2^198444931 is an apocalyptic number.

198444931 is a deficient number, since it is larger than the sum of its proper divisors (1188461).

198444931 is a wasteful number, since it uses less digits than its factorization.

198444931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188460.

The product of its digits is 124416, while the sum is 43.

The square root of 198444931 is about 14087.0483423604. The cubic root of 198444931 is about 583.2839191521.

The spelling of 198444931 in words is "one hundred ninety-eight million, four hundred forty-four thousand, nine hundred thirty-one".