9932318621 has 2 divisors, whose sum is σ = 9932318622. Its totient is φ = 9932318620.

The previous prime is 9932318611. The next prime is 9932318623. The reversal of 9932318621 is 1268132399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9186264025 + 746054596 = 95845^2 + 27314^2 .

It is an emirp because it is prime and its reverse (1268132399) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9932318621 is a prime.

Together with 9932318623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9932318623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4966159310 + 4966159311.

It is an arithmetic number, because the mean of its divisors is an integer number (4966159311).

Almost surely, 2^9932318621 is an apocalyptic number.

It is an amenable number.

9932318621 is a deficient number, since it is larger than the sum of its proper divisors (1).

9932318621 is an equidigital number, since it uses as much as digits as its factorization.

9932318621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 9932318621 is about 99661.0185629266. The cubic root of 9932318621 is about 2149.5631794011.

The spelling of 9932318621 in words is "nine billion, nine hundred thirty-two million, three hundred eighteen thousand, six hundred twenty-one".