9986399 has 8 divisors (see below), whose sum is σ = 10219920. Its totient is φ = 9755136.

The previous prime is 9986377. The next prime is 9986407. The reversal of 9986399 is 9936899.

9986399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9986399 - 2¹² = 9982303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9986399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986359) 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, 10949 + ... + 11825.

It is an arithmetic number, because the mean of its divisors is an integer number (1277490).

Almost surely, 2^9986399 is an apocalyptic number.

9986399 is a deficient number, since it is larger than the sum of its proper divisors (233521).

9986399 is a wasteful number, since it uses less digits than its factorization.

9986399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129.

The product of its digits is 944784, while the sum is 53.

The square root of 9986399 is about 3160.1264215218. The cubic root of 9986399 is about 215.3457497998.

The spelling of 9986399 in words is "nine million, nine hundred eighty-six thousand, three hundred ninety-nine".