9978789241 has 2 divisors, whose sum is σ = 9978789242. Its totient is φ = 9978789240.

The previous prime is 9978789221. The next prime is 9978789253. The reversal of 9978789241 is 1429878799.

It is a happy number.

9978789241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9965829241 + 12960000 = 99829^2 + 3600^2 .

It is an emirp because it is prime and its reverse (1429878799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9978789241 - 2¹¹ = 9978787193 is a prime.

It is not a weakly prime, because it can be changed into another prime (9978789221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989394620 + 4989394621.

It is an arithmetic number, because the mean of its divisors is an integer number (4989394621).

Almost surely, 2^9978789241 is an apocalyptic number.

It is an amenable number.

9978789241 is a deficient number, since it is larger than the sum of its proper divisors (1).

9978789241 is an equidigital number, since it uses as much as digits as its factorization.

9978789241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 64.

The square root of 9978789241 is about 99893.8899082421. The cubic root of 9978789241 is about 2152.9103719589.

The spelling of 9978789241 in words is "nine billion, nine hundred seventy-eight million, seven hundred eighty-nine thousand, two hundred forty-one".