513638647 has 8 divisors (see below), whose sum is σ = 541935360. Its totient is φ = 485468280.

The previous prime is 513638641. The next prime is 513638677. The reversal of 513638647 is 746836315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 513638647 - 2¹⁵ = 513605879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513638641) 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 in 7 ways as a sum of consecutive naturals, for example, 23173 + ... + 39550.

It is an arithmetic number, because the mean of its divisors is an integer number (67741920).

Almost surely, 2^513638647 is an apocalyptic number.

513638647 is a deficient number, since it is larger than the sum of its proper divisors (28296713).

513638647 is a wasteful number, since it uses less digits than its factorization.

513638647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63173.

The product of its digits is 362880, while the sum is 43.

The square root of 513638647 is about 22663.5973975889. The cubic root of 513638647 is about 800.8525530979.

The spelling of 513638647 in words is "five hundred thirteen million, six hundred thirty-eight thousand, six hundred forty-seven".