30928747 has 2 divisors, whose sum is σ = 30928748. Its totient is φ = 30928746.

The previous prime is 30928717. The next prime is 30928753. The reversal of 30928747 is 74782903.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30928747 is a prime.

It is not a weakly prime, because it can be changed into another prime (30928717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15464373 + 15464374.

It is an arithmetic number, because the mean of its divisors is an integer number (15464374).

Almost surely, 2^30928747 is an apocalyptic number.

30928747 is a deficient number, since it is larger than the sum of its proper divisors (1).

30928747 is an equidigital number, since it uses as much as digits as its factorization.

30928747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 30928747 is about 5561.3619734738. The cubic root of 30928747 is about 313.8972001779.

The spelling of 30928747 in words is "thirty million, nine hundred twenty-eight thousand, seven hundred forty-seven".