999985000043 has 2 divisors, whose sum is σ = 999985000044. Its totient is φ = 999985000042.

The previous prime is 999985000039. The next prime is 999985000081. The reversal of 999985000043 is 340000589999.

999985000043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999985000043 - 2² = 999985000039 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (999985000093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499992500021 + 499992500022.

It is an arithmetic number, because the mean of its divisors is an integer number (499992500022).

Almost surely, 2^999985000043 is an apocalyptic number.

999985000043 is a deficient number, since it is larger than the sum of its proper divisors (1).

999985000043 is an equidigital number, since it uses as much as digits as its factorization.

999985000043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3149280, while the sum is 56.

The spelling of 999985000043 in words is "nine hundred ninety-nine billion, nine hundred eighty-five million, forty-three", and thus it is an aban number.