198019399 has 8 divisors (see below), whose sum is σ = 201600000. Its totient is φ = 194446392.

The previous prime is 198019391. The next prime is 198019403. The reversal of 198019399 is 993910891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198019399 - 2³ = 198019391 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 (198019391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87322 + ... + 89560.

It is an arithmetic number, because the mean of its divisors is an integer number (25200000).

Almost surely, 2^198019399 is an apocalyptic number.

198019399 is a deficient number, since it is larger than the sum of its proper divisors (3580601).

198019399 is a wasteful number, since it uses less digits than its factorization.

198019399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3797.

The product of its (nonzero) digits is 157464, while the sum is 49.

The square root of 198019399 is about 14071.9365760367. The cubic root of 198019399 is about 582.8667024879.

The spelling of 198019399 in words is "one hundred ninety-eight million, nineteen thousand, three hundred ninety-nine".