7383721 has 2 divisors, whose sum is σ = 7383722. Its totient is φ = 7383720.

The previous prime is 7383709. The next prime is 7383751. The reversal of 7383721 is 1273837.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3920400 + 3463321 = 1980^2 + 1861^2 .

It is a cyclic number.

It is not a de Polignac number, because 7383721 - 2⁵ = 7383689 is a prime.

It is not a weakly prime, because it can be changed into another prime (7383751) 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, 3691860 + 3691861.

It is an arithmetic number, because the mean of its divisors is an integer number (3691861).

Almost surely, 2^7383721 is an apocalyptic number.

It is an amenable number.

7383721 is a deficient number, since it is larger than the sum of its proper divisors (1).

7383721 is an equidigital number, since it uses as much as digits as its factorization.

7383721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 7383721 is about 2717.3003146506. The cubic root of 7383721 is about 194.7265155917.

The spelling of 7383721 in words is "seven million, three hundred eighty-three thousand, seven hundred twenty-one".