30664987 has 2 divisors, whose sum is σ = 30664988. Its totient is φ = 30664986.

The previous prime is 30664981. The next prime is 30664999. The reversal of 30664987 is 78946603.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30664987 is a prime.

It is not a weakly prime, because it can be changed into another prime (30664981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15332493 + 15332494.

It is an arithmetic number, because the mean of its divisors is an integer number (15332494).

Almost surely, 2^30664987 is an apocalyptic number.

30664987 is a deficient number, since it is larger than the sum of its proper divisors (1).

30664987 is an equidigital number, since it uses as much as digits as its factorization.

30664987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 30664987 is about 5537.5975837903. The cubic root of 30664987 is about 313.0023476638.

The spelling of 30664987 in words is "thirty million, six hundred sixty-four thousand, nine hundred eighty-seven".