2143316789 has 2 divisors, whose sum is σ = 2143316790. Its totient is φ = 2143316788.

The previous prime is 2143316783. The next prime is 2143316827. The reversal of 2143316789 is 9876133412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1538992900 + 604323889 = 39230^2 + 24583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143316789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143316783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071658394 + 1071658395.

It is an arithmetic number, because the mean of its divisors is an integer number (1071658395).

Almost surely, 2^2143316789 is an apocalyptic number.

It is an amenable number.

2143316789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143316789 is an equidigital number, since it uses as much as digits as its factorization.

2143316789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 2143316789 is about 46295.9694681945. The cubic root of 2143316789 is about 1289.3241635453.

The spelling of 2143316789 in words is "two billion, one hundred forty-three million, three hundred sixteen thousand, seven hundred eighty-nine".