198993399 has 8 divisors (see below), whose sum is σ = 289444992. Its totient is φ = 120602040.

The previous prime is 198993397. The next prime is 198993439. The reversal of 198993399 is 993399891.

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

It is not a de Polignac number, because 198993399 - 2¹ = 198993397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198993397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3015019 + ... + 3015084.

It is an arithmetic number, because the mean of its divisors is an integer number (36180624).

Almost surely, 2^198993399 is an apocalyptic number.

198993399 is a deficient number, since it is larger than the sum of its proper divisors (90451593).

198993399 is a wasteful number, since it uses less digits than its factorization.

198993399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6030117.

The product of its digits is 4251528, while the sum is 60.

The square root of 198993399 is about 14106.5020114839. The cubic root of 198993399 is about 583.8207906605.

The spelling of 198993399 in words is "one hundred ninety-eight million, nine hundred ninety-three thousand, three hundred ninety-nine".