9984905999 has 2 divisors, whose sum is σ = 9984906000. Its totient is φ = 9984905998.

The previous prime is 9984905947. The next prime is 9984906007. The reversal of 9984905999 is 9995094899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9984905999 - 2⁸ = 9984905743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9984965999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4992452999 + 4992453000.

It is an arithmetic number, because the mean of its divisors is an integer number (4992453000).

Almost surely, 2^9984905999 is an apocalyptic number.

9984905999 is a deficient number, since it is larger than the sum of its proper divisors (1).

9984905999 is an equidigital number, since it uses as much as digits as its factorization.

9984905999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85030560, while the sum is 71.

The square root of 9984905999 is about 99924.5014948786. The cubic root of 9984905999 is about 2153.3501762148.

The spelling of 9984905999 in words is "nine billion, nine hundred eighty-four million, nine hundred five thousand, nine hundred ninety-nine".