9978960847 has 2 divisors, whose sum is σ = 9978960848. Its totient is φ = 9978960846.

The previous prime is 9978960829. The next prime is 9978960869. The reversal of 9978960847 is 7480698799.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9978960847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9978960877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989480423 + 4989480424.

It is an arithmetic number, because the mean of its divisors is an integer number (4989480424).

Almost surely, 2^9978960847 is an apocalyptic number.

9978960847 is a deficient number, since it is larger than the sum of its proper divisors (1).

9978960847 is an equidigital number, since it uses as much as digits as its factorization.

9978960847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54867456, while the sum is 67.

The square root of 9978960847 is about 99894.7488459729. The cubic root of 9978960847 is about 2152.9227131428.

The spelling of 9978960847 in words is "nine billion, nine hundred seventy-eight million, nine hundred sixty thousand, eight hundred forty-seven".