198363939 has 8 divisors (see below), whose sum is σ = 280043280. Its totient is φ = 124463616.

The previous prime is 198363901. The next prime is 198363943. The reversal of 198363939 is 939363891.

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

It is not a de Polignac number, because 198363939 - 2⁹ = 198363427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 3889489 = 198363939 / (1 + 9 + 8 + 3 + 6 + 3 + 9 + 3 + 9).

It is a junction number, because it is equal to n+sod(n) for n = 198363891 and 198363900.

It is not an unprimeable number, because it can be changed into a prime (198361939) 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, 1944694 + ... + 1944795.

It is an arithmetic number, because the mean of its divisors is an integer number (35005410).

Almost surely, 2^198363939 is an apocalyptic number.

198363939 is a deficient number, since it is larger than the sum of its proper divisors (81679341).

198363939 is a wasteful number, since it uses less digits than its factorization.

198363939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889509.

The product of its digits is 944784, while the sum is 51.

The square root of 198363939 is about 14084.1733516739. The cubic root of 198363939 is about 583.2045558088.

The spelling of 198363939 in words is "one hundred ninety-eight million, three hundred sixty-three thousand, nine hundred thirty-nine".