9969986 has 16 divisors (see below), whose sum is σ = 16207800. Its totient is φ = 4599504.

The previous prime is 9969959. The next prime is 9970001. The reversal of 9969986 is 6899699.

It can be written as a sum of positive squares in 4 ways, for example, as 78961 + 9891025 = 281^2 + 3145^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3260 + ... + 5528.

Almost surely, 2^9969986 is an apocalyptic number.

9969986 is a deficient number, since it is larger than the sum of its proper divisors (6237814).

9969986 is a wasteful number, since it uses less digits than its factorization.

9969986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310 (or 2284 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 56.

The square root of 9969986 is about 3157.5284638464. The cubic root of 9969986 is about 215.2277089890.

The spelling of 9969986 in words is "nine million, nine hundred sixty-nine thousand, nine hundred eighty-six".