198343407 has 4 divisors (see below), whose sum is σ = 264457880. Its totient is φ = 132228936.

The previous prime is 198343381. The next prime is 198343423. The reversal of 198343407 is 704343891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704343891 = 3 ⋅234781297.

It is not a de Polignac number, because 198343407 - 2⁷ = 198343279 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 (198343447) 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 3 ways as a sum of consecutive naturals, for example, 33057232 + ... + 33057237.

It is an arithmetic number, because the mean of its divisors is an integer number (66114470).

Almost surely, 2^198343407 is an apocalyptic number.

198343407 is a deficient number, since it is larger than the sum of its proper divisors (66114473).

198343407 is an equidigital number, since it uses as much as digits as its factorization.

198343407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66114472.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 198343407 is about 14083.4444295421. Note that the first 4 decimals coincide. The cubic root of 198343407 is about 583.1844332516.

The spelling of 198343407 in words is "one hundred ninety-eight million, three hundred forty-three thousand, four hundred seven".