30328813 has 2 divisors, whose sum is σ = 30328814. Its totient is φ = 30328812.

The previous prime is 30328787. The next prime is 30328847. The reversal of 30328813 is 31882303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30327049 + 1764 = 5507^2 + 42^2 .

It is an emirp because it is prime and its reverse (31882303) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30328813 is a prime.

It is equal to p_1877050 and since 30328813 and 1877050 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30328873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15164406 + 15164407.

It is an arithmetic number, because the mean of its divisors is an integer number (15164407).

Almost surely, 2^30328813 is an apocalyptic number.

It is an amenable number.

30328813 is a deficient number, since it is larger than the sum of its proper divisors (1).

30328813 is an equidigital number, since it uses as much as digits as its factorization.

30328813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 30328813 is about 5507.1601574677. The cubic root of 30328813 is about 311.8543486553.

The spelling of 30328813 in words is "thirty million, three hundred twenty-eight thousand, eight hundred thirteen".