9111990689 has 2 divisors, whose sum is σ = 9111990690. Its totient is φ = 9111990688.

The previous prime is 9111990647. The next prime is 9111990737. The reversal of 9111990689 is 9860991119.

9111990689 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6674890000 + 2437100689 = 81700^2 + 49367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9111990689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9111990689.

It is not a weakly prime, because it can be changed into another prime (9111990989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4555995344 + 4555995345.

It is an arithmetic number, because the mean of its divisors is an integer number (4555995345).

Almost surely, 2^9111990689 is an apocalyptic number.

It is an amenable number.

9111990689 is a deficient number, since it is larger than the sum of its proper divisors (1).

9111990689 is an equidigital number, since it uses as much as digits as its factorization.

9111990689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 53.

The square root of 9111990689 is about 95456.7477394867. The cubic root of 9111990689 is about 2088.6760606188.

The spelling of 9111990689 in words is "nine billion, one hundred eleven million, nine hundred ninety thousand, six hundred eighty-nine".