2143239899 has 2 divisors, whose sum is σ = 2143239900. Its totient is φ = 2143239898.

The previous prime is 2143239887. The next prime is 2143239937. The reversal of 2143239899 is 9989323412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143239899 is a prime.

It is not a weakly prime, because it can be changed into another prime (2143239829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071619949 + 1071619950.

It is an arithmetic number, because the mean of its divisors is an integer number (1071619950).

Almost surely, 2^2143239899 is an apocalyptic number.

2143239899 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143239899 is an equidigital number, since it uses as much as digits as its factorization.

2143239899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 50.

The square root of 2143239899 is about 46295.1390428844. The cubic root of 2143239899 is about 1289.3087454915.

The spelling of 2143239899 in words is "two billion, one hundred forty-three million, two hundred thirty-nine thousand, eight hundred ninety-nine".