30668987 has 2 divisors, whose sum is σ = 30668988. Its totient is φ = 30668986.

The previous prime is 30668929. The next prime is 30668999. The reversal of 30668987 is 78986603.

It is a strong prime.

It is an emirp because it is prime and its reverse (78986603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30668987 - 2¹⁸ = 30406843 is a prime.

It is not a weakly prime, because it can be changed into another prime (30668387) 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, 15334493 + 15334494.

It is an arithmetic number, because the mean of its divisors is an integer number (15334494).

Almost surely, 2^30668987 is an apocalyptic number.

30668987 is a deficient number, since it is larger than the sum of its proper divisors (1).

30668987 is an equidigital number, since it uses as much as digits as its factorization.

30668987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 30668987 is about 5537.9587394635. The cubic root of 30668987 is about 313.0159566152.

The spelling of 30668987 in words is "thirty million, six hundred sixty-eight thousand, nine hundred eighty-seven".