30685387 has 2 divisors, whose sum is σ = 30685388. Its totient is φ = 30685386.

The previous prime is 30685373. The next prime is 30685409. The reversal of 30685387 is 78358603.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30685387 - 2¹⁵ = 30652619 is a prime.

It is not a weakly prime, because it can be changed into another prime (30685307) 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, 15342693 + 15342694.

It is an arithmetic number, because the mean of its divisors is an integer number (15342694).

Almost surely, 2^30685387 is an apocalyptic number.

30685387 is a deficient number, since it is larger than the sum of its proper divisors (1).

30685387 is an equidigital number, since it uses as much as digits as its factorization.

30685387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 30685387 is about 5539.4392315468. The cubic root of 30685387 is about 313.0717409481.

The spelling of 30685387 in words is "thirty million, six hundred eighty-five thousand, three hundred eighty-seven".