384047987 has 2 divisors, whose sum is σ = 384047988. Its totient is φ = 384047986.

The previous prime is 384047981. The next prime is 384048011. The reversal of 384047987 is 789740483.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-384047987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (384047981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192023993 + 192023994.

It is an arithmetic number, because the mean of its divisors is an integer number (192023994).

Almost surely, 2^384047987 is an apocalyptic number.

384047987 is a deficient number, since it is larger than the sum of its proper divisors (1).

384047987 is an equidigital number, since it uses as much as digits as its factorization.

384047987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The square root of 384047987 is about 19597.1423171849. The cubic root of 384047987 is about 726.8785130127.

The spelling of 384047987 in words is "three hundred eighty-four million, forty-seven thousand, nine hundred eighty-seven".