198278349 has 4 divisors (see below), whose sum is σ = 264371136. Its totient is φ = 132185564.

The previous prime is 198278347. The next prime is 198278359. The reversal of 198278349 is 943872891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198278349 - 2¹ = 198278347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198278341) 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 3 ways as a sum of consecutive naturals, for example, 33046389 + ... + 33046394.

It is an arithmetic number, because the mean of its divisors is an integer number (66092784).

Almost surely, 2^198278349 is an apocalyptic number.

It is an amenable number.

198278349 is a deficient number, since it is larger than the sum of its proper divisors (66092787).

198278349 is an equidigital number, since it uses as much as digits as its factorization.

198278349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66092786.

The product of its digits is 870912, while the sum is 51.

The square root of 198278349 is about 14081.1345068499. The cubic root of 198278349 is about 583.1206634454.

The spelling of 198278349 in words is "one hundred ninety-eight million, two hundred seventy-eight thousand, three hundred forty-nine".