515049839 has 2 divisors, whose sum is σ = 515049840. Its totient is φ = 515049838.

The previous prime is 515049823. The next prime is 515049851. The reversal of 515049839 is 938940515.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 515049839 - 2⁴ = 515049823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 515049839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515049859) 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, 257524919 + 257524920.

It is an arithmetic number, because the mean of its divisors is an integer number (257524920).

Almost surely, 2^515049839 is an apocalyptic number.

515049839 is a deficient number, since it is larger than the sum of its proper divisors (1).

515049839 is an equidigital number, since it uses as much as digits as its factorization.

515049839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 515049839 is about 22694.7094936243. The cubic root of 515049839 is about 801.5853142109.

The spelling of 515049839 in words is "five hundred fifteen million, forty-nine thousand, eight hundred thirty-nine".