2143740859 has 4 divisors (see below), whose sum is σ = 2308644016. Its totient is φ = 1978837704.

The previous prime is 2143740821. The next prime is 2143740881. The reversal of 2143740859 is 9580473412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2143740859 - 2²⁹ = 1606869947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143740889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82451559 + ... + 82451584.

It is an arithmetic number, because the mean of its divisors is an integer number (577161004).

Almost surely, 2^2143740859 is an apocalyptic number.

2143740859 is a deficient number, since it is larger than the sum of its proper divisors (164903157).

2143740859 is a wasteful number, since it uses less digits than its factorization.

2143740859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164903156.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 2143740859 is about 46300.5492300037. The cubic root of 2143740859 is about 1289.4091918286.

The spelling of 2143740859 in words is "two billion, one hundred forty-three million, seven hundred forty thousand, eight hundred fifty-nine".