9999996399 has 32 divisors (see below), whose sum is σ = 15308052480. Its totient is φ = 6445137600.

The previous prime is 9999996397. The next prime is 9999996431. The reversal of 9999996399 is 9936999999.

It is not a de Polignac number, because 9999996399 - 2¹ = 9999996397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999996397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 912744 + ... + 923634.

It is an arithmetic number, because the mean of its divisors is an integer number (478376640).

Almost surely, 2^9999996399 is an apocalyptic number.

9999996399 is a deficient number, since it is larger than the sum of its proper divisors (5308056081).

9999996399 is a wasteful number, since it uses less digits than its factorization.

9999996399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12028 (or 12022 counting only the distinct ones).

The product of its digits is 774840978, while the sum is 81.

The square root of 9999996399 is about 99999.9819949984. The cubic root of 9999996399 is about 2154.4344314279.

The spelling of 9999996399 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-six thousand, three hundred ninety-nine".