9481721 has 2 divisors, whose sum is σ = 9481722. Its totient is φ = 9481720.

The previous prime is 9481711. The next prime is 9481723. The reversal of 9481721 is 1271849.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8934121 + 547600 = 2989^2 + 740^2 .

It is an emirp because it is prime and its reverse (1271849) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9481721 is a prime.

Together with 9481723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9481723) 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, 4740860 + 4740861.

It is an arithmetic number, because the mean of its divisors is an integer number (4740861).

Almost surely, 2^9481721 is an apocalyptic number.

It is an amenable number.

9481721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9481721 is an equidigital number, since it uses as much as digits as its factorization.

9481721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 9481721 is about 3079.2403283927. The cubic root of 9481721 is about 211.6552558243.

The spelling of 9481721 in words is "nine million, four hundred eighty-one thousand, seven hundred twenty-one".