513539613 has 24 divisors (see below), whose sum is σ = 767889408. Its totient is φ = 330456672.

The previous prime is 513539591. The next prime is 513539623. The reversal of 513539613 is 316935315.

513539613 is a `hidden beast` number, since 5 + 1 + 3 + 5 + 39 + 613 = 666.

It is not a de Polignac number, because 513539613 - 2¹⁰ = 513538589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513539623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36220 + ... + 48362.

It is an arithmetic number, because the mean of its divisors is an integer number (31995392).

Almost surely, 2^513539613 is an apocalyptic number.

It is an amenable number.

513539613 is a deficient number, since it is larger than the sum of its proper divisors (254349795).

513539613 is a wasteful number, since it uses less digits than its factorization.

513539613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12313 (or 12310 counting only the distinct ones).

The product of its digits is 36450, while the sum is 36.

The square root of 513539613 is about 22661.4124228831. The cubic root of 513539613 is about 800.8010793429.

The spelling of 513539613 in words is "five hundred thirteen million, five hundred thirty-nine thousand, six hundred thirteen".