9313921 has 2 divisors, whose sum is σ = 9313922. Its totient is φ = 9313920.

The previous prime is 9313897. The next prime is 9313949. The reversal of 9313921 is 1293139.

It is an a-pointer prime, because the next prime (9313949) can be obtained adding 9313921 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9235521 + 78400 = 3039^2 + 280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9313921 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9313921.

It is not a weakly prime, because it can be changed into another prime (9313991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4656960 + 4656961.

It is an arithmetic number, because the mean of its divisors is an integer number (4656961).

Almost surely, 2^9313921 is an apocalyptic number.

It is an amenable number.

9313921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9313921 is an equidigital number, since it uses as much as digits as its factorization.

9313921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 28.

The square root of 9313921 is about 3051.8717207642. The cubic root of 9313921 is about 210.3992480347.

The spelling of 9313921 in words is "nine million, three hundred thirteen thousand, nine hundred twenty-one".