9479316521 has 2 divisors, whose sum is σ = 9479316522. Its totient is φ = 9479316520.

The previous prime is 9479316487. The next prime is 9479316533. The reversal of 9479316521 is 1256139749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9478969600 + 346921 = 97360^2 + 589^2 .

It is an emirp because it is prime and its reverse (1256139749) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9479316521 - 2²⁶ = 9412207657 is a prime.

It is not a weakly prime, because it can be changed into another prime (9479316221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4739658260 + 4739658261.

It is an arithmetic number, because the mean of its divisors is an integer number (4739658261).

Almost surely, 2^9479316521 is an apocalyptic number.

It is an amenable number.

9479316521 is a deficient number, since it is larger than the sum of its proper divisors (1).

9479316521 is an equidigital number, since it uses as much as digits as its factorization.

9479316521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 9479316521 is about 97361.7816240028. The cubic root of 9479316521 is about 2116.3736302318.

The spelling of 9479316521 in words is "nine billion, four hundred seventy-nine million, three hundred sixteen thousand, five hundred twenty-one".