9131321 has 2 divisors, whose sum is σ = 9131322. Its totient is φ = 9131320.

The previous prime is 9131303. The next prime is 9131333. The reversal of 9131321 is 1231319.

9131321 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., 8620096 + 511225 = 2936^2 + 715^2 .

It is an emirp because it is prime and its reverse (1231319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9131321 - 2¹⁸ = 8869177 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9131293 and 9131302.

It is not a weakly prime, because it can be changed into another prime (9131021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4565660 + 4565661.

It is an arithmetic number, because the mean of its divisors is an integer number (4565661).

Almost surely, 2^9131321 is an apocalyptic number.

It is an amenable number.

9131321 is a deficient number, since it is larger than the sum of its proper divisors (1).

9131321 is an equidigital number, since it uses as much as digits as its factorization.

9131321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 20.

The square root of 9131321 is about 3021.8075716366. The cubic root of 9131321 is about 209.0152000117.

The spelling of 9131321 in words is "nine million, one hundred thirty-one thousand, three hundred twenty-one".