30328657 has 2 divisors, whose sum is σ = 30328658. Its totient is φ = 30328656.

The previous prime is 30328609. The next prime is 30328687. The reversal of 30328657 is 75682303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30041361 + 287296 = 5481^2 + 536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30328657 is a prime.

It is not a weakly prime, because it can be changed into another prime (30328607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15164328 + 15164329.

It is an arithmetic number, because the mean of its divisors is an integer number (15164329).

Almost surely, 2^30328657 is an apocalyptic number.

It is an amenable number.

30328657 is a deficient number, since it is larger than the sum of its proper divisors (1).

30328657 is an equidigital number, since it uses as much as digits as its factorization.

30328657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 30328657 is about 5507.1459940699. The cubic root of 30328657 is about 311.8538139672.

The spelling of 30328657 in words is "thirty million, three hundred twenty-eight thousand, six hundred fifty-seven".