198403385 has 4 divisors (see below), whose sum is σ = 238084068. Its totient is φ = 158722704.

The previous prime is 198403367. The next prime is 198403393. The reversal of 198403385 is 583304891.

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 44568976 + 153834409 = 6676^2 + 12403^2 .

It is a cyclic number.

It is not a de Polignac number, because 198403385 - 2¹⁰ = 198402361 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19840334 + ... + 19840343.

It is an arithmetic number, because the mean of its divisors is an integer number (59521017).

Almost surely, 2^198403385 is an apocalyptic number.

It is an amenable number.

198403385 is a deficient number, since it is larger than the sum of its proper divisors (39680683).

198403385 is an equidigital number, since it uses as much as digits as its factorization.

198403385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39680682.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 198403385 is about 14085.5736482402. The cubic root of 198403385 is about 583.2432112927.

The spelling of 198403385 in words is "one hundred ninety-eight million, four hundred three thousand, three hundred eighty-five".