9731321 has 2 divisors, whose sum is σ = 9731322. Its totient is φ = 9731320.

The previous prime is 9731317. The next prime is 9731387. The reversal of 9731321 is 1231379.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6451600 + 3279721 = 2540^2 + 1811^2 .

It is an emirp because it is prime and its reverse (1231379) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9731321 - 2² = 9731317 is a prime.

It is not a weakly prime, because it can be changed into another prime (9734321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4865660 + 4865661.

It is an arithmetic number, because the mean of its divisors is an integer number (4865661).

Almost surely, 2^9731321 is an apocalyptic number.

It is an amenable number.

9731321 is a deficient number, since it is larger than the sum of its proper divisors (1).

9731321 is an equidigital number, since it uses as much as digits as its factorization.

9731321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 26.

The square root of 9731321 is about 3119.5065314886. The cubic root of 9731321 is about 213.4964212444.

The spelling of 9731321 in words is "nine million, seven hundred thirty-one thousand, three hundred twenty-one".