8334721 has 2 divisors, whose sum is σ = 8334722. Its totient is φ = 8334720.

The previous prime is 8334719. The next prime is 8334751. The reversal of 8334721 is 1274338.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6051600 + 2283121 = 2460^2 + 1511^2 .

It is a cyclic number.

It is not a de Polignac number, because 8334721 - 2¹ = 8334719 is a prime.

Together with 8334719, it forms a pair of twin primes.

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 8334721.

It is not a weakly prime, because it can be changed into another prime (8334701) 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, 4167360 + 4167361.

It is an arithmetic number, because the mean of its divisors is an integer number (4167361).

Almost surely, 2^8334721 is an apocalyptic number.

It is an amenable number.

8334721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8334721 is an equidigital number, since it uses as much as digits as its factorization.

8334721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 8334721 is about 2886.9916868602. The cubic root of 8334721 is about 202.7513193198.

The spelling of 8334721 in words is "eight million, three hundred thirty-four thousand, seven hundred twenty-one".