2180947169 has 2 divisors, whose sum is σ = 2180947170. Its totient is φ = 2180947168.

The previous prime is 2180947103. The next prime is 2180947177. The reversal of 2180947169 is 9617490812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1646736400 + 534210769 = 40580^2 + 23113^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2180947169 is a prime.

It is a super-2 number, since 2×2180947169² = 9513061107938229122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2180947189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090473584 + 1090473585.

It is an arithmetic number, because the mean of its divisors is an integer number (1090473585).

Almost surely, 2^2180947169 is an apocalyptic number.

It is an amenable number.

2180947169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2180947169 is an equidigital number, since it uses as much as digits as its factorization.

2180947169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 2180947169 is about 46700.6120837832. The cubic root of 2180947169 is about 1296.8260180960.

The spelling of 2180947169 in words is "two billion, one hundred eighty million, nine hundred forty-seven thousand, one hundred sixty-nine".