9999986 has 16 divisors (see below), whose sum is σ = 15768000. Its totient is φ = 4747248.

The previous prime is 9999973. The next prime is 9999991. The reversal of 9999986 is 6899999.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6125 + ... + 7583.

It is an arithmetic number, because the mean of its divisors is an integer number (985500).

Almost surely, 2^9999986 is an apocalyptic number.

9999986 is a deficient number, since it is larger than the sum of its proper divisors (5768014).

9999986 is a wasteful number, since it uses less digits than its factorization.

9999986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633.

The product of its digits is 2834352, while the sum is 59.

The square root of 9999986 is about 3162.2754465732. The cubic root of 9999986 is about 215.4433684629.

The spelling of 9999986 in words is "nine million, nine hundred ninety-nine thousand, nine hundred eighty-six".