513899987 has 8 divisors (see below), whose sum is σ = 544366656. Its totient is φ = 483459712.

The previous prime is 513899963. The next prime is 513899999. The reversal of 513899987 is 789998315.

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 513899987 - 2¹⁰ = 513898963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (513899387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45158 + ... + 55380.

It is an arithmetic number, because the mean of its divisors is an integer number (68045832).

Almost surely, 2^513899987 is an apocalyptic number.

513899987 is a deficient number, since it is larger than the sum of its proper divisors (30466669).

513899987 is a wasteful number, since it uses less digits than its factorization.

513899987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13197.

The product of its digits is 4898880, while the sum is 59.

The square root of 513899987 is about 22669.3622980445. The cubic root of 513899987 is about 800.9883550026.

The spelling of 513899987 in words is "five hundred thirteen million, eight hundred ninety-nine thousand, nine hundred eighty-seven".