384689489 has 2 divisors, whose sum is σ = 384689490. Its totient is φ = 384689488.

The previous prime is 384689443. The next prime is 384689519. The reversal of 384689489 is 984986483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281971264 + 102718225 = 16792^2 + 10135^2 .

It is a cyclic number.

It is not a de Polignac number, because 384689489 - 2¹² = 384685393 is a prime.

It is a super-2 number, since 2×384689489² = 295972005894162242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (384689419) 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, 192344744 + 192344745.

It is an arithmetic number, because the mean of its divisors is an integer number (192344745).

Almost surely, 2^384689489 is an apocalyptic number.

It is an amenable number.

384689489 is a deficient number, since it is larger than the sum of its proper divisors (1).

384689489 is an equidigital number, since it uses as much as digits as its factorization.

384689489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11943936, while the sum is 59.

The square root of 384689489 is about 19613.5027213397. The cubic root of 384689489 is about 727.2830064167.

The spelling of 384689489 in words is "three hundred eighty-four million, six hundred eighty-nine thousand, four hundred eighty-nine".