384089509 has 2 divisors, whose sum is σ = 384089510. Its totient is φ = 384089508.

The previous prime is 384089477. The next prime is 384089533. The reversal of 384089509 is 905980483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273902500 + 110187009 = 16550^2 + 10497^2 .

It is a cyclic number.

It is not a de Polignac number, because 384089509 - 2⁵ = 384089477 is a prime.

It is a super-2 number, since 2×384089509² = 295049501847722162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (384089539) 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, 192044754 + 192044755.

It is an arithmetic number, because the mean of its divisors is an integer number (192044755).

Almost surely, 2^384089509 is an apocalyptic number.

It is an amenable number.

384089509 is a deficient number, since it is larger than the sum of its proper divisors (1).

384089509 is an equidigital number, since it uses as much as digits as its factorization.

384089509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 384089509 is about 19598.2016777050. The cubic root of 384089509 is about 726.9047079701.

The spelling of 384089509 in words is "three hundred eighty-four million, eighty-nine thousand, five hundred nine".