100999985 has 8 divisors (see below), whose sum is σ = 122907456. Its totient is φ = 79661680.

The previous prime is 100999981. The next prime is 100999993. The reversal of 100999985 is 589999001.

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

It is not a de Polignac number, because 100999985 - 2² = 100999981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100999981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141899 + ... + 142608.

It is an arithmetic number, because the mean of its divisors is an integer number (15363432).

Almost surely, 2^100999985 is an apocalyptic number.

It is an amenable number.

100999985 is a deficient number, since it is larger than the sum of its proper divisors (21907471).

100999985 is an equidigital number, since it uses as much as digits as its factorization.

100999985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284583.

The product of its (nonzero) digits is 262440, while the sum is 50.

The square root of 100999985 is about 10049.8748748430. The cubic root of 100999985 is about 465.7009277259.

The spelling of 100999985 in words is "one hundred million, nine hundred ninety-nine thousand, nine hundred eighty-five".