2143243387 has 2 divisors, whose sum is σ = 2143243388. Its totient is φ = 2143243386.

The previous prime is 2143243379. The next prime is 2143243391. The reversal of 2143243387 is 7833423412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2143243387 - 2³ = 2143243379 is a prime.

It is not a weakly prime, because it can be changed into another prime (2143243787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071621693 + 1071621694.

It is an arithmetic number, because the mean of its divisors is an integer number (1071621694).

Almost surely, 2^2143243387 is an apocalyptic number.

2143243387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143243387 is an equidigital number, since it uses as much as digits as its factorization.

2143243387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 37.

The square root of 2143243387 is about 46295.1767142107. The cubic root of 2143243387 is about 1289.3094449165.

Adding to 2143243387 its reverse (7833423412), we get a palindrome (9976666799).

It can be divided in two parts, 214 and 3243387, that added together give a square (3243601 = 1801²).

The spelling of 2143243387 in words is "two billion, one hundred forty-three million, two hundred forty-three thousand, three hundred eighty-seven".