100999986 has 8 divisors (see below), whose sum is σ = 201999984. Its totient is φ = 33666660.

The previous prime is 100999981. The next prime is 100999993. The reversal of 100999986 is 689999001.

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

100999986 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 8416660 + ... + 8416671.

It is an arithmetic number, because the mean of its divisors is an integer number (25249998).

Almost surely, 2^100999986 is an apocalyptic number.

100999986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100999986 is a wasteful number, since it uses less digits than its factorization.

100999986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16833336.

The product of its (nonzero) digits is 314928, while the sum is 51.

The square root of 100999986 is about 10049.8749245948. The cubic root of 100999986 is about 465.7009292628.

The spelling of 100999986 in words is "one hundred million, nine hundred ninety-nine thousand, nine hundred eighty-six".