513727730 has 8 divisors (see below), whose sum is σ = 924709932. Its totient is φ = 205491088.

The previous prime is 513727729. The next prime is 513727759. The reversal of 513727730 is 37727315.

It can be written as a sum of positive squares in 2 ways, for example, as 512524321 + 1203409 = 22639^2 + 1097^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25686377 + ... + 25686396.

Almost surely, 2^513727730 is an apocalyptic number.

513727730 is a deficient number, since it is larger than the sum of its proper divisors (410982202).

513727730 is a wasteful number, since it uses less digits than its factorization.

513727730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51372780.

The product of its (nonzero) digits is 30870, while the sum is 35.

The square root of 513727730 is about 22665.5626446819. The cubic root of 513727730 is about 800.8988490847.

The spelling of 513727730 in words is "five hundred thirteen million, seven hundred twenty-seven thousand, seven hundred thirty".