198939249 has 12 divisors (see below), whose sum is σ = 288452736. Its totient is φ = 132120312.

The previous prime is 198939241. The next prime is 198939311. The reversal of 198939249 is 942939891.

It is not a de Polignac number, because 198939249 - 2³ = 198939241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198939195 and 198939204.

It is not an unprimeable number, because it can be changed into a prime (198939241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39657 + ... + 44390.

It is an arithmetic number, because the mean of its divisors is an integer number (24037728).

Almost surely, 2^198939249 is an apocalyptic number.

It is an amenable number.

198939249 is a deficient number, since it is larger than the sum of its proper divisors (89513487).

198939249 is a wasteful number, since it uses less digits than its factorization.

198939249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84316 (or 84313 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 198939249 is about 14104.5825531988. The cubic root of 198939249 is about 583.7678295003.

The spelling of 198939249 in words is "one hundred ninety-eight million, nine hundred thirty-nine thousand, two hundred forty-nine".