9806688399 has 4 divisors (see below), whose sum is σ = 13075584536. Its totient is φ = 6537792264.

The previous prime is 9806688349. The next prime is 9806688431. The reversal of 9806688399 is 9938866089.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 9806688399 - 2⁷ = 9806688271 is a prime.

It is a super-2 number, since 2×9806688399² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9806688349) 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 3 ways as a sum of consecutive naturals, for example, 1634448064 + ... + 1634448069.

It is an arithmetic number, because the mean of its divisors is an integer number (3268896134).

Almost surely, 2^9806688399 is an apocalyptic number.

9806688399 is a deficient number, since it is larger than the sum of its proper divisors (3268896137).

9806688399 is a wasteful number, since it uses less digits than its factorization.

9806688399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268896136.

The product of its (nonzero) digits is 40310784, while the sum is 66.

The square root of 9806688399 is about 99028.7251205427. The cubic root of 9806688399 is about 2140.4616873704.

The spelling of 9806688399 in words is "nine billion, eight hundred six million, six hundred eighty-eight thousand, three hundred ninety-nine".