2144747789 has 2 divisors, whose sum is σ = 2144747790. Its totient is φ = 2144747788.

The previous prime is 2144747783. The next prime is 2144747821. The reversal of 2144747789 is 9877474412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1387562500 + 757185289 = 37250^2 + 27517^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144747789 - 2⁸ = 2144747533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2144747789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2144747783) 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, 1072373894 + 1072373895.

It is an arithmetic number, because the mean of its divisors is an integer number (1072373895).

Almost surely, 2^2144747789 is an apocalyptic number.

It is an amenable number.

2144747789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144747789 is an equidigital number, since it uses as much as digits as its factorization.

2144747789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 53.

The square root of 2144747789 is about 46311.4217985153. The cubic root of 2144747789 is about 1289.6110417187.

The spelling of 2144747789 in words is "two billion, one hundred forty-four million, seven hundred forty-seven thousand, seven hundred eighty-nine".