9331921 has 2 divisors, whose sum is σ = 9331922. Its totient is φ = 9331920.

The previous prime is 9331919. The next prime is 9331957. The reversal of 9331921 is 1291339.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7096896 + 2235025 = 2664^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 9331921 - 2¹ = 9331919 is a prime.

Together with 9331919, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 9331921.

It is not a weakly prime, because it can be changed into another prime (9331121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4665960 + 4665961.

It is an arithmetic number, because the mean of its divisors is an integer number (4665961).

Almost surely, 2^9331921 is an apocalyptic number.

It is an amenable number.

9331921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9331921 is an equidigital number, since it uses as much as digits as its factorization.

9331921 is an odious number, because the sum of its binary digits is odd.

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

The square root of 9331921 is about 3054.8193072586. The cubic root of 9331921 is about 210.5346993800.

The spelling of 9331921 in words is "nine million, three hundred thirty-one thousand, nine hundred twenty-one".