513856487 has 4 divisors (see below), whose sum is σ = 515903976. Its totient is φ = 511809000.

The previous prime is 513856477. The next prime is 513856513. The reversal of 513856487 is 784658315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513856487 - 2²² = 509662183 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 (513856477) 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 3 ways as a sum of consecutive naturals, for example, 1023368 + ... + 1023869.

It is an arithmetic number, because the mean of its divisors is an integer number (128975994).

Almost surely, 2^513856487 is an apocalyptic number.

513856487 is a deficient number, since it is larger than the sum of its proper divisors (2047489).

513856487 is a wasteful number, since it uses less digits than its factorization.

513856487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047488.

The product of its digits is 806400, while the sum is 47.

The square root of 513856487 is about 22668.4028330185. The cubic root of 513856487 is about 800.9657539924.

The spelling of 513856487 in words is "five hundred thirteen million, eight hundred fifty-six thousand, four hundred eighty-seven".