9117396521 has 2 divisors, whose sum is σ = 9117396522. Its totient is φ = 9117396520.

The previous prime is 9117396517. The next prime is 9117396571. The reversal of 9117396521 is 1256937119.

9117396521 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 can be written as a sum of positive squares in only one way, i.e., 9103258921 + 14137600 = 95411^2 + 3760^2 .

It is a cyclic number.

It is not a de Polignac number, because 9117396521 - 2² = 9117396517 is a prime.

It is a super-2 number, since 2×9117396521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9117396571) 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, 4558698260 + 4558698261.

It is an arithmetic number, because the mean of its divisors is an integer number (4558698261).

Almost surely, 2^9117396521 is an apocalyptic number.

It is an amenable number.

9117396521 is a deficient number, since it is larger than the sum of its proper divisors (1).

9117396521 is an equidigital number, since it uses as much as digits as its factorization.

9117396521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 44.

The square root of 9117396521 is about 95485.0591506336. The cubic root of 9117396521 is about 2089.0890256209.

The spelling of 9117396521 in words is "nine billion, one hundred seventeen million, three hundred ninety-six thousand, five hundred twenty-one".