9994994987 has 2 divisors, whose sum is σ = 9994994988. Its totient is φ = 9994994986.

The previous prime is 9994994981. The next prime is 9994995013. The reversal of 9994994987 is 7894994999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9994994987 is a prime.

It is not a weakly prime, because it can be changed into another prime (9994994981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4997497493 + 4997497494.

It is an arithmetic number, because the mean of its divisors is an integer number (4997497494).

Almost surely, 2^9994994987 is an apocalyptic number.

9994994987 is a deficient number, since it is larger than the sum of its proper divisors (1).

9994994987 is an equidigital number, since it uses as much as digits as its factorization.

9994994987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476171136, while the sum is 77.

The square root of 9994994987 is about 99974.9718029468. The cubic root of 9994994987 is about 2154.0751975954.

The spelling of 9994994987 in words is "nine billion, nine hundred ninety-four million, nine hundred ninety-four thousand, nine hundred eighty-seven".