30724189 has 2 divisors, whose sum is σ = 30724190. Its totient is φ = 30724188.

The previous prime is 30724181. The next prime is 30724201. The reversal of 30724189 is 98142703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20548089 + 10176100 = 4533^2 + 3190^2 .

It is a cyclic number.

It is not a de Polignac number, because 30724189 - 2³ = 30724181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30724181) 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, 15362094 + 15362095.

It is an arithmetic number, because the mean of its divisors is an integer number (15362095).

Almost surely, 2^30724189 is an apocalyptic number.

It is an amenable number.

30724189 is a deficient number, since it is larger than the sum of its proper divisors (1).

30724189 is an equidigital number, since it uses as much as digits as its factorization.

30724189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 30724189 is about 5542.9404651322. The cubic root of 30724189 is about 313.2036462199.

The spelling of 30724189 in words is "thirty million, seven hundred twenty-four thousand, one hundred eighty-nine".