198999151 has 8 divisors (see below), whose sum is σ = 223624800. Its totient is φ = 175704672.

The previous prime is 198999121. The next prime is 198999169. The reversal of 198999151 is 151999891.

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

It is not a de Polignac number, because 198999151 - 2¹³ = 198990959 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 (198999121) 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, 332476 + ... + 333073.

It is an arithmetic number, because the mean of its divisors is an integer number (27953100).

Almost surely, 2^198999151 is an apocalyptic number.

198999151 is a deficient number, since it is larger than the sum of its proper divisors (24625649).

198999151 is a wasteful number, since it uses less digits than its factorization.

198999151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665585.

The product of its digits is 262440, while the sum is 52.

The square root of 198999151 is about 14106.7058876266. The cubic root of 198999151 is about 583.8264158133.

The spelling of 198999151 in words is "one hundred ninety-eight million, nine hundred ninety-nine thousand, one hundred fifty-one".