9313721 has 2 divisors, whose sum is σ = 9313722. Its totient is φ = 9313720.

The previous prime is 9313699. The next prime is 9313747. The reversal of 9313721 is 1273139.

It is an a-pointer prime, because the next prime (9313747) can be obtained adding 9313721 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6817321 + 2496400 = 2611^2 + 1580^2 .

It is a cyclic number.

It is not a de Polignac number, because 9313721 - 2¹⁰ = 9312697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9313771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4656860 + 4656861.

It is an arithmetic number, because the mean of its divisors is an integer number (4656861).

Almost surely, 2^9313721 is an apocalyptic number.

It is an amenable number.

9313721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9313721 is an equidigital number, since it uses as much as digits as its factorization.

9313721 is an odious number, because the sum of its binary digits is odd.

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

The square root of 9313721 is about 3051.8389538113. The cubic root of 9313721 is about 210.3977420399.

The spelling of 9313721 in words is "nine million, three hundred thirteen thousand, seven hundred twenty-one".