9948715891 has 2 divisors, whose sum is σ = 9948715892. Its totient is φ = 9948715890.

The previous prime is 9948715879. The next prime is 9948715937. The reversal of 9948715891 is 1985178499.

9948715891 is digitally balanced in base 3, 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 9948715891 - 2¹⁷ = 9948584819 is a prime.

It is not a weakly prime, because it can be changed into another prime (9948715291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4974357945 + 4974357946.

It is an arithmetic number, because the mean of its divisors is an integer number (4974357946).

Almost surely, 2^9948715891 is an apocalyptic number.

9948715891 is a deficient number, since it is larger than the sum of its proper divisors (1).

9948715891 is an equidigital number, since it uses as much as digits as its factorization.

9948715891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 61.

The square root of 9948715891 is about 99743.2498518070. The cubic root of 9948715891 is about 2150.7454340366.

The spelling of 9948715891 in words is "nine billion, nine hundred forty-eight million, seven hundred fifteen thousand, eight hundred ninety-one".