2000043989 has 2 divisors, whose sum is σ = 2000043990. Its totient is φ = 2000043988.

The previous prime is 2000043977. The next prime is 2000044003. The reversal of 2000043989 is 9893400002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1646979889 + 353064100 = 40583^2 + 18790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000043989 - 2⁴ = 2000043973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000043389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000021994 + 1000021995.

It is an arithmetic number, because the mean of its divisors is an integer number (1000021995).

Almost surely, 2^2000043989 is an apocalyptic number.

It is an amenable number.

2000043989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000043989 is an equidigital number, since it uses as much as digits as its factorization.

2000043989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2000043989 is about 44721.8513592628. The cubic root of 2000043989 is about 1259.9302869383.

The spelling of 2000043989 in words is "two billion, forty-three thousand, nine hundred eighty-nine".