2122847689 has 2 divisors, whose sum is σ = 2122847690. Its totient is φ = 2122847688.

The previous prime is 2122847687. The next prime is 2122847707. The reversal of 2122847689 is 9867482212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1960718400 + 162129289 = 44280^2 + 12733^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122847689 - 2¹ = 2122847687 is a prime.

Together with 2122847687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2122847687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061423844 + 1061423845.

It is an arithmetic number, because the mean of its divisors is an integer number (1061423845).

Almost surely, 2^2122847689 is an apocalyptic number.

It is an amenable number.

2122847689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122847689 is an equidigital number, since it uses as much as digits as its factorization.

2122847689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 49.

The square root of 2122847689 is about 46074.3712816572. The cubic root of 2122847689 is about 1285.2065939844.

The spelling of 2122847689 in words is "two billion, one hundred twenty-two million, eight hundred forty-seven thousand, six hundred eighty-nine".