198119789 has 12 divisors (see below), whose sum is σ = 231011424. Its totient is φ = 169415064.

The previous prime is 198119743. The next prime is 198119807. The reversal of 198119789 is 987911891.

It is a de Polignac number, because none of the positive numbers 2^k-198119789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198119789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198119689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17144 + ... + 26270.

It is an arithmetic number, because the mean of its divisors is an integer number (19250952).

Almost surely, 2^198119789 is an apocalyptic number.

It is an amenable number.

198119789 is a deficient number, since it is larger than the sum of its proper divisors (32891635).

198119789 is an equidigital number, since it uses as much as digits as its factorization.

198119789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9584 (or 9577 counting only the distinct ones).

The product of its digits is 326592, while the sum is 53.

The square root of 198119789 is about 14075.5031526408. The cubic root of 198119789 is about 582.9651845946.

The spelling of 198119789 in words is "one hundred ninety-eight million, one hundred nineteen thousand, seven hundred eighty-nine".