30084721 has 2 divisors, whose sum is σ = 30084722. Its totient is φ = 30084720.

The previous prime is 30084697. The next prime is 30084731. The reversal of 30084721 is 12748003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23658496 + 6426225 = 4864^2 + 2535^2 .

It is a cyclic number.

It is not a de Polignac number, because 30084721 - 2⁵ = 30084689 is a prime.

It is not a weakly prime, because it can be changed into another prime (30084731) 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, 15042360 + 15042361.

It is an arithmetic number, because the mean of its divisors is an integer number (15042361).

Almost surely, 2^30084721 is an apocalyptic number.

It is an amenable number.

30084721 is a deficient number, since it is larger than the sum of its proper divisors (1).

30084721 is an equidigital number, since it uses as much as digits as its factorization.

30084721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 30084721 is about 5484.9540563254. The cubic root of 30084721 is about 311.0154732913.

The spelling of 30084721 in words is "thirty million, eighty-four thousand, seven hundred twenty-one".