515839 has 2 divisors, whose sum is σ = 515840. Its totient is φ = 515838.

The previous prime is 515813. The next prime is 515843. The reversal of 515839 is 938515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 515839 - 2¹⁵ = 483071 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 515839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515539) 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, 257919 + 257920.

It is an arithmetic number, because the mean of its divisors is an integer number (257920).

2⁵¹⁵⁸³⁹ is an apocalyptic number.

515839 is a deficient number, since it is larger than the sum of its proper divisors (1).

515839 is an equidigital number, since it uses as much as digits as its factorization.

515839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 515839 is about 718.2193258330. The cubic root of 515839 is about 80.1994502484.

The spelling of 515839 in words is "five hundred fifteen thousand, eight hundred thirty-nine".