9164901521 has 2 divisors, whose sum is σ = 9164901522. Its totient is φ = 9164901520.

The previous prime is 9164901511. The next prime is 9164901527. The reversal of 9164901521 is 1251094619.

9164901521 is digitally balanced in base 3, 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., 8832240400 + 332661121 = 93980^2 + 18239^2 .

It is an emirp because it is prime and its reverse (1251094619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9164901521 - 2²² = 9160707217 is a prime.

It is a super-2 number, since 2×9164901521² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9164901527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4582450760 + 4582450761.

It is an arithmetic number, because the mean of its divisors is an integer number (4582450761).

Almost surely, 2^9164901521 is an apocalyptic number.

It is an amenable number.

9164901521 is a deficient number, since it is larger than the sum of its proper divisors (1).

9164901521 is an equidigital number, since it uses as much as digits as its factorization.

9164901521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 9164901521 is about 95733.4921592229. The cubic root of 9164901521 is about 2092.7110504082.

The spelling of 9164901521 in words is "nine billion, one hundred sixty-four million, nine hundred one thousand, five hundred twenty-one".