513687 has 8 divisors (see below), whose sum is σ = 693504. Its totient is φ = 338168.

The previous prime is 513683. The next prime is 513691. The reversal of 513687 is 786315.

It is an interprime number because it is at equal distance from previous prime (513683) and next prime (513691).

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 513687 - 2² = 513683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 783 + ... + 1280.

It is an arithmetic number, because the mean of its divisors is an integer number (86688).

2⁵¹³⁶⁸⁷ is an apocalyptic number.

513687 is a deficient number, since it is larger than the sum of its proper divisors (179817).

513687 is a wasteful number, since it uses less digits than its factorization.

513687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149.

The product of its digits is 5040, while the sum is 30.

The square root of 513687 is about 716.7196104475. The cubic root of 513687 is about 80.0877682573.

The spelling of 513687 in words is "five hundred thirteen thousand, six hundred eighty-seven".