108203985 has 32 divisors (see below), whose sum is σ = 194369280. Its totient is φ = 57106944.

The previous prime is 108203971. The next prime is 108203987. The reversal of 108203985 is 589302801.

It is not a de Polignac number, because 108203985 - 2¹⁰ = 108202961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (108203987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8964 + ... + 17226.

It is an arithmetic number, because the mean of its divisors is an integer number (6074040).

Almost surely, 2^108203985 is an apocalyptic number.

108203985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

108203985 is a deficient number, since it is larger than the sum of its proper divisors (86165295).

108203985 is an equidigital number, since it uses as much as digits as its factorization.

108203985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8374 (or 8368 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 108203985 is about 10402.1144485148. The cubic root of 108203985 is about 476.5199474001.

The spelling of 108203985 in words is "one hundred eight million, two hundred three thousand, nine hundred eighty-five".