9999030689 has 2 divisors, whose sum is σ = 9999030690. Its totient is φ = 9999030688.

The previous prime is 9999030673. The next prime is 9999030731. The reversal of 9999030689 is 9860309999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8884005025 + 1115025664 = 94255^2 + 33392^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999030689 - 2⁴ = 9999030673 is a prime.

It is a super-2 number, since 2×9999030689² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9999030619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999515344 + 4999515345.

It is an arithmetic number, because the mean of its divisors is an integer number (4999515345).

Almost surely, 2^9999030689 is an apocalyptic number.

It is an amenable number.

9999030689 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999030689 is an equidigital number, since it uses as much as digits as its factorization.

9999030689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The square root of 9999030689 is about 99995.1533275488. The cubic root of 9999030689 is about 2154.3650772078.

The spelling of 9999030689 in words is "nine billion, nine hundred ninety-nine million, thirty thousand, six hundred eighty-nine".