2144664209 has 2 divisors, whose sum is σ = 2144664210. Its totient is φ = 2144664208.

The previous prime is 2144664167. The next prime is 2144664211. The reversal of 2144664209 is 9024664412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1125267025 + 1019397184 = 33545^2 + 31928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2144664209 is a prime.

Together with 2144664211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2144664409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072332104 + 1072332105.

It is an arithmetic number, because the mean of its divisors is an integer number (1072332105).

Almost surely, 2^2144664209 is an apocalyptic number.

It is an amenable number.

2144664209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144664209 is an equidigital number, since it uses as much as digits as its factorization.

2144664209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 2144664209 is about 46310.5194205377. The cubic root of 2144664209 is about 1289.5942896183.

The spelling of 2144664209 in words is "two billion, one hundred forty-four million, six hundred sixty-four thousand, two hundred nine".