9984985943 has 2 divisors, whose sum is σ = 9984985944. Its totient is φ = 9984985942.

The previous prime is 9984985931. The next prime is 9984985981. The reversal of 9984985943 is 3495894899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9984985943 - 2⁸ = 9984985687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9984985243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4992492971 + 4992492972.

It is an arithmetic number, because the mean of its divisors is an integer number (4992492972).

Almost surely, 2^9984985943 is an apocalyptic number.

9984985943 is a deficient number, since it is larger than the sum of its proper divisors (1).

9984985943 is an equidigital number, since it uses as much as digits as its factorization.

9984985943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100776960, while the sum is 68.

The square root of 9984985943 is about 99924.9015160886. The cubic root of 9984985943 is about 2153.3559231214.

The spelling of 9984985943 in words is "nine billion, nine hundred eighty-four million, nine hundred eighty-five thousand, nine hundred forty-three".