198393049 has 4 divisors (see below), whose sum is σ = 201110836. Its totient is φ = 195675264.

The previous prime is 198393007. The next prime is 198393061. The reversal of 198393049 is 940393891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 152695449 + 45697600 = 12357^2 + 6760^2 .

It is a cyclic number.

It is not a de Polignac number, because 198393049 - 2⁷ = 198392921 is a prime.

It is a super-3 number, since 3×198393049³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198396049) 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, 1358784 + ... + 1358929.

It is an arithmetic number, because the mean of its divisors is an integer number (50277709).

Almost surely, 2^198393049 is an apocalyptic number.

It is an amenable number.

198393049 is a deficient number, since it is larger than the sum of its proper divisors (2717787).

198393049 is an equidigital number, since it uses as much as digits as its factorization.

198393049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717786.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 198393049 is about 14085.2067432466. The cubic root of 198393049 is about 583.2330829264.

The spelling of 198393049 in words is "one hundred ninety-eight million, three hundred ninety-three thousand, forty-nine".