108621985 has 16 divisors (see below), whose sum is σ = 140405760. Its totient is φ = 80435520.

The previous prime is 108621971. The next prime is 108621991. The reversal of 108621985 is 589126801.

It is not a de Polignac number, because 108621985 - 2¹¹ = 108619937 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 11670 + ... + 18799.

It is an arithmetic number, because the mean of its divisors is an integer number (8775360).

Almost surely, 2^108621985 is an apocalyptic number.

It is an amenable number.

108621985 is a deficient number, since it is larger than the sum of its proper divisors (31783775).

108621985 is a wasteful number, since it uses less digits than its factorization.

108621985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30528.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 108621985 is about 10422.1871504977. The cubic root of 108621985 is about 477.1327695552.

The spelling of 108621985 in words is "one hundred eight million, six hundred twenty-one thousand, nine hundred eighty-five".