2123266709 has 2 divisors, whose sum is σ = 2123266710. Its totient is φ = 2123266708.

The previous prime is 2123266669. The next prime is 2123266757. The reversal of 2123266709 is 9076623212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1850290225 + 272976484 = 43015^2 + 16522^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123266709 - 2²⁴ = 2106489493 is a prime.

It is a super-4 number, since 4×2123266709⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123266309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061633354 + 1061633355.

It is an arithmetic number, because the mean of its divisors is an integer number (1061633355).

Almost surely, 2^2123266709 is an apocalyptic number.

It is an amenable number.

2123266709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123266709 is an equidigital number, since it uses as much as digits as its factorization.

2123266709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 2123266709 is about 46078.9182707233. The cubic root of 2123266709 is about 1285.2911489340.

The spelling of 2123266709 in words is "two billion, one hundred twenty-three million, two hundred sixty-six thousand, seven hundred nine".