2143659839 has 2 divisors, whose sum is σ = 2143659840. Its totient is φ = 2143659838.

The previous prime is 2143659821. The next prime is 2143659877. The reversal of 2143659839 is 9389563412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2143659839 - 2¹² = 2143655743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143653839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071829919 + 1071829920.

It is an arithmetic number, because the mean of its divisors is an integer number (1071829920).

Almost surely, 2^2143659839 is an apocalyptic number.

2143659839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143659839 is an equidigital number, since it uses as much as digits as its factorization.

2143659839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 50.

The square root of 2143659839 is about 46299.6742861113. The cubic root of 2143659839 is about 1289.3929477557.

The spelling of 2143659839 in words is "two billion, one hundred forty-three million, six hundred fifty-nine thousand, eight hundred thirty-nine".