198465985 has 4 divisors (see below), whose sum is σ = 238159188. Its totient is φ = 158772784.

The previous prime is 198465959. The next prime is 198465991. The reversal of 198465985 is 589564891.

198465985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589564891 = 6011 ⋅98081.

It can be written as a sum of positive squares in 2 ways, for example, as 75898944 + 122567041 = 8712^2 + 11071^2 .

It is a cyclic number.

It is not a de Polignac number, because 198465985 - 2⁷ = 198465857 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, 19846594 + ... + 19846603.

It is an arithmetic number, because the mean of its divisors is an integer number (59539797).

Almost surely, 2^198465985 is an apocalyptic number.

It is an amenable number.

198465985 is a deficient number, since it is larger than the sum of its proper divisors (39693203).

198465985 is an equidigital number, since it uses as much as digits as its factorization.

198465985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39693202.

The product of its digits is 3110400, while the sum is 55.

The square root of 198465985 is about 14087.7956047069. The cubic root of 198465985 is about 583.3045462438.

The spelling of 198465985 in words is "one hundred ninety-eight million, four hundred sixty-five thousand, nine hundred eighty-five".