198948939 has 16 divisors (see below), whose sum is σ = 307000320. Its totient is φ = 112245120.

The previous prime is 198948907. The next prime is 198948941. The reversal of 198948939 is 939849891.

It is a happy number.

It is not a de Polignac number, because 198948939 - 2⁵ = 198948907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198948949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58302 + ... + 61619.

It is an arithmetic number, because the mean of its divisors is an integer number (19187520).

Almost surely, 2^198948939 is an apocalyptic number.

198948939 is a deficient number, since it is larger than the sum of its proper divisors (108051381).

198948939 is a wasteful number, since it uses less digits than its factorization.

198948939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120010.

The product of its digits is 5038848, while the sum is 60.

The square root of 198948939 is about 14104.9260543967. The cubic root of 198948939 is about 583.7773074665. Note that the first 3 decimals are identical.

The spelling of 198948939 in words is "one hundred ninety-eight million, nine hundred forty-eight thousand, nine hundred thirty-nine".