2143659877 has 2 divisors, whose sum is σ = 2143659878. Its totient is φ = 2143659876.

The previous prime is 2143659839. The next prime is 2143659883. The reversal of 2143659877 is 7789563412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1777549921 + 366109956 = 42161^2 + 19134^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143659877 - 2¹¹ = 2143657829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143659977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071829938 + 1071829939.

It is an arithmetic number, because the mean of its divisors is an integer number (1071829939).

Almost surely, 2^2143659877 is an apocalyptic number.

It is an amenable number.

2143659877 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143659877 is an equidigital number, since it uses as much as digits as its factorization.

2143659877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 52.

The square root of 2143659877 is about 46299.6746964814. The cubic root of 2143659877 is about 1289.3929553746.

The spelling of 2143659877 in words is "two billion, one hundred forty-three million, six hundred fifty-nine thousand, eight hundred seventy-seven".