2143993609871 has 2 divisors, whose sum is σ = 2143993609872. Its totient is φ = 2143993609870.

The previous prime is 2143993609817. The next prime is 2143993609909. The reversal of 2143993609871 is 1789063993412.

Together with previous prime (2143993609817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2143993609871 - 2¹⁰ = 2143993608847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143993602871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071996804935 + 1071996804936.

It is an arithmetic number, because the mean of its divisors is an integer number (1071996804936).

Almost surely, 2^{2143993609871} is an apocalyptic number.

2143993609871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143993609871 is an equidigital number, since it uses as much as digits as its factorization.

2143993609871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17635968, while the sum is 62.

The spelling of 2143993609871 in words is "two trillion, one hundred forty-three billion, nine hundred ninety-three million, six hundred nine thousand, eight hundred seventy-one".