9999872745847 has 2 divisors, whose sum is σ = 9999872745848. Its totient is φ = 9999872745846.

The previous prime is 9999872745829. The next prime is 9999872745869. The reversal of 9999872745847 is 7485472789999.

9999872745847 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 an emirp because it is prime and its reverse (7485472789999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9999872745847 - 2³¹ = 9997725262199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999872745887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999936372923 + 4999936372924.

It is an arithmetic number, because the mean of its divisors is an integer number (4999936372924).

Almost surely, 2^{9999872745847} is an apocalyptic number.

9999872745847 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999872745847 is an equidigital number, since it uses as much as digits as its factorization.

9999872745847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23044331520, while the sum is 88.

The spelling of 9999872745847 in words is "nine trillion, nine hundred ninety-nine billion, eight hundred seventy-two million, seven hundred forty-five thousand, eight hundred forty-seven".