30382721 has 2 divisors, whose sum is σ = 30382722. Its totient is φ = 30382720.

The previous prime is 30382687. The next prime is 30382733. The reversal of 30382721 is 12728303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19891600 + 10491121 = 4460^2 + 3239^2 .

It is a cyclic number.

It is not a de Polignac number, because 30382721 - 2⁶ = 30382657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30382321) 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, 15191360 + 15191361.

It is an arithmetic number, because the mean of its divisors is an integer number (15191361).

Almost surely, 2^30382721 is an apocalyptic number.

It is an amenable number.

30382721 is a deficient number, since it is larger than the sum of its proper divisors (1).

30382721 is an equidigital number, since it uses as much as digits as its factorization.

30382721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 30382721 is about 5512.0523400998. The cubic root of 30382721 is about 312.0390079707.

The spelling of 30382721 in words is "thirty million, three hundred eighty-two thousand, seven hundred twenty-one".