198111946 has 4 divisors (see below), whose sum is σ = 297167922. Its totient is φ = 99055972.

The previous prime is 198111941. The next prime is 198111961. The reversal of 198111946 is 649111891.

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

It can be written as a sum of positive squares in only one way, i.e., 123099025 + 75012921 = 11095^2 + 8661^2 .

It is a junction number, because it is equal to n+sod(n) for n = 198111899 and 198111908.

It is not an unprimeable number, because it can be changed into a prime (198111941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49527985 + ... + 49527988.

Almost surely, 2^198111946 is an apocalyptic number.

198111946 is a deficient number, since it is larger than the sum of its proper divisors (99055976).

198111946 is an equidigital number, since it uses as much as digits as its factorization.

198111946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99055975.

The product of its digits is 15552, while the sum is 40.

The square root of 198111946 is about 14075.2245452781. The cubic root of 198111946 is about 582.9574918476.

The spelling of 198111946 in words is "one hundred ninety-eight million, one hundred eleven thousand, nine hundred forty-six".