2111772869 has 2 divisors, whose sum is σ = 2111772870. Its totient is φ = 2111772868.

The previous prime is 2111772851. The next prime is 2111772881. The reversal of 2111772869 is 9682771112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1970472100 + 141300769 = 44390^2 + 11887^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111772869 - 2²⁰ = 2110724293 is a prime.

It is a super-2 number, since 2×2111772869² = 8919169300488982322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111772829) 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, 1055886434 + 1055886435.

It is an arithmetic number, because the mean of its divisors is an integer number (1055886435).

Almost surely, 2^2111772869 is an apocalyptic number.

It is an amenable number.

2111772869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111772869 is an equidigital number, since it uses as much as digits as its factorization.

2111772869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 44.

The square root of 2111772869 is about 45954.0299538571. The cubic root of 2111772869 is about 1282.9677372636.

The spelling of 2111772869 in words is "two billion, one hundred eleven million, seven hundred seventy-two thousand, eight hundred sixty-nine".