2991101689 has 2 divisors, whose sum is σ = 2991101690. Its totient is φ = 2991101688.

The previous prime is 2991101611. The next prime is 2991101717. The reversal of 2991101689 is 9861011992.

2991101689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2451933289 + 539168400 = 49517^2 + 23220^2 .

It is a cyclic number.

It is not a de Polignac number, because 2991101689 - 2⁹ = 2991101177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2991101989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495550844 + 1495550845.

It is an arithmetic number, because the mean of its divisors is an integer number (1495550845).

Almost surely, 2^2991101689 is an apocalyptic number.

It is an amenable number.

2991101689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2991101689 is an equidigital number, since it uses as much as digits as its factorization.

2991101689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 46.

The square root of 2991101689 is about 54690.9653324934. The cubic root of 2991101689 is about 1440.8222042243.

The spelling of 2991101689 in words is "two billion, nine hundred ninety-one million, one hundred one thousand, six hundred eighty-nine".