518389 has 2 divisors, whose sum is σ = 518390. Its totient is φ = 518388.

The previous prime is 518387. The next prime is 518411. The reversal of 518389 is 983815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311364 + 207025 = 558^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 518389 - 2¹ = 518387 is a prime.

Together with 518387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259194 + 259195.

It is an arithmetic number, because the mean of its divisors is an integer number (259195).

2⁵¹⁸³⁸⁹ is an apocalyptic number.

It is an amenable number.

518389 is a deficient number, since it is larger than the sum of its proper divisors (1).

518389 is an equidigital number, since it uses as much as digits as its factorization.

518389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 518389 is about 719.9923610706. The cubic root of 518389 is about 80.3313858143.

The spelling of 518389 in words is "five hundred eighteen thousand, three hundred eighty-nine".