100186985 has 8 divisors (see below), whose sum is σ = 123156936. Its totient is φ = 78194560.

The previous prime is 100186973. The next prime is 100187027. The reversal of 100186985 is 589681001.

It can be written as a sum of positive squares in 4 ways, for example, as 7661824 + 92525161 = 2768^2 + 9619^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100186985 - 2⁶ = 100186921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244154 + ... + 244563.

It is an arithmetic number, because the mean of its divisors is an integer number (15394617).

Almost surely, 2^100186985 is an apocalyptic number.

It is an amenable number.

100186985 is a deficient number, since it is larger than the sum of its proper divisors (22969951).

100186985 is an equidigital number, since it uses as much as digits as its factorization.

100186985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488763.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 100186985 is about 10009.3448836575. The cubic root of 100186985 is about 464.4480057270.

The spelling of 100186985 in words is "one hundred million, one hundred eighty-six thousand, nine hundred eighty-five".