198485005 has 4 divisors (see below), whose sum is σ = 238182012. Its totient is φ = 158788000.

The previous prime is 198484991. The next prime is 198485093. The reversal of 198485005 is 500584891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500584891 = 3697 ⋅135403.

It can be written as a sum of positive squares in 2 ways, for example, as 155201764 + 43283241 = 12458^2 + 6579^2 .

It is not a de Polignac number, because 198485005 - 2¹³ = 198476813 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19848496 + ... + 19848505.

It is an arithmetic number, because the mean of its divisors is an integer number (59545503).

Almost surely, 2^198485005 is an apocalyptic number.

It is an amenable number.

198485005 is a deficient number, since it is larger than the sum of its proper divisors (39697007).

198485005 is an equidigital number, since it uses as much as digits as its factorization.

198485005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39697006.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 198485005 is about 14088.4706409177. The cubic root of 198485005 is about 583.3231793244.

The spelling of 198485005 in words is "one hundred ninety-eight million, four hundred eighty-five thousand, five".