9816399 has 6 divisors (see below), whose sum is σ = 14179256. Its totient is φ = 6544260.

The previous prime is 9816397. The next prime is 9816403. The reversal of 9816399 is 9936189.

9816399 is a `hidden beast` number, since 9 + 8 + 1 + 639 + 9 = 666.

It is not a de Polignac number, because 9816399 - 2¹ = 9816397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9816397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 545347 + ... + 545364.

Almost surely, 2^9816399 is an apocalyptic number.

9816399 is a deficient number, since it is larger than the sum of its proper divisors (4362857).

9816399 is a wasteful number, since it uses less digits than its factorization.

9816399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090717 (or 1090714 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 9816399 is about 3133.1133078776. The cubic root of 9816399 is about 214.1167950682.

The spelling of 9816399 in words is "nine million, eight hundred sixteen thousand, three hundred ninety-nine".