2143987229 has 2 divisors, whose sum is σ = 2143987230. Its totient is φ = 2143987228.

The previous prime is 2143987171. The next prime is 2143987231. The reversal of 2143987229 is 9227893412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2118484729 + 25502500 = 46027^2 + 5050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143987229 is a prime.

Together with 2143987231, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143987259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071993614 + 1071993615.

It is an arithmetic number, because the mean of its divisors is an integer number (1071993615).

Almost surely, 2^2143987229 is an apocalyptic number.

It is an amenable number.

2143987229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143987229 is an equidigital number, since it uses as much as digits as its factorization.

2143987229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 2143987229 is about 46303.2097051597. The cubic root of 2143987229 is about 1289.4585851703.

The spelling of 2143987229 in words is "two billion, one hundred forty-three million, nine hundred eighty-seven thousand, two hundred twenty-nine".