9999280685 has 16 divisors (see below), whose sum is σ = 12146399616. Its totient is φ = 7901644608.

The previous prime is 9999280661. The next prime is 9999280703. The reversal of 9999280685 is 5860829999.

It is a cyclic number.

It is not a de Polignac number, because 9999280685 - 2²⁴ = 9982503469 is a prime.

It is a super-2 number, since 2×9999280685² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 180002 + ... + 228908.

It is an arithmetic number, because the mean of its divisors is an integer number (759149976).

Almost surely, 2^9999280685 is an apocalyptic number.

It is an amenable number.

9999280685 is a deficient number, since it is larger than the sum of its proper divisors (2147118931).

9999280685 is a wasteful number, since it uses less digits than its factorization.

9999280685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49412.

The product of its (nonzero) digits is 25194240, while the sum is 65.

The square root of 9999280685 is about 99996.4033603209. The cubic root of 9999280685 is about 2154.3830315536.

The spelling of 9999280685 in words is "nine billion, nine hundred ninety-nine million, two hundred eighty thousand, six hundred eighty-five".