108801985 has 4 divisors (see below), whose sum is σ = 130562388. Its totient is φ = 87041584.

The previous prime is 108801967. The next prime is 108801991. The reversal of 108801985 is 589108801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589108801 = 14657 ⋅40193.

It can be written as a sum of positive squares in 2 ways, for example, as 26337424 + 82464561 = 5132^2 + 9081^2 .

It is a cyclic number.

It is not a de Polignac number, because 108801985 - 2¹³ = 108793793 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10880194 + ... + 10880203.

It is an arithmetic number, because the mean of its divisors is an integer number (32640597).

Almost surely, 2^108801985 is an apocalyptic number.

It is an amenable number.

108801985 is a deficient number, since it is larger than the sum of its proper divisors (21760403).

108801985 is an equidigital number, since it uses as much as digits as its factorization.

108801985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21760402.

The product of its (nonzero) digits is 23040, while the sum is 40.

The square root of 108801985 is about 10430.8189994842. The cubic root of 108801985 is about 477.3961800182.

The spelling of 108801985 in words is "one hundred eight million, eight hundred one thousand, nine hundred eighty-five".