513508789 has 2 divisors, whose sum is σ = 513508790. Its totient is φ = 513508788.

The previous prime is 513508757. The next prime is 513508819. The reversal of 513508789 is 987805315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276656689 + 236852100 = 16633^2 + 15390^2 .

It is a cyclic number.

It is not a de Polignac number, because 513508789 - 2⁵ = 513508757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513508889) 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, 256754394 + 256754395.

It is an arithmetic number, because the mean of its divisors is an integer number (256754395).

Almost surely, 2^513508789 is an apocalyptic number.

It is an amenable number.

513508789 is a deficient number, since it is larger than the sum of its proper divisors (1).

513508789 is an equidigital number, since it uses as much as digits as its factorization.

513508789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 513508789 is about 22660.7323138508. The cubic root of 513508789 is about 800.7850569591.

The spelling of 513508789 in words is "five hundred thirteen million, five hundred eight thousand, seven hundred eighty-nine".