513868 has 6 divisors (see below), whose sum is σ = 899276. Its totient is φ = 256932.

The previous prime is 513841. The next prime is 513871. The reversal of 513868 is 868315.

It is a zygodrome in base 3.

It is an unprimeable number.

513868 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64230 + ... + 64237.

2⁵¹³⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

513868 is a deficient number, since it is larger than the sum of its proper divisors (385408).

513868 is a wasteful number, since it uses less digits than its factorization.

513868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128471 (or 128469 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 513868 is about 716.8458690681. The cubic root of 513868 is about 80.0971735851.

The spelling of 513868 in words is "five hundred thirteen thousand, eight hundred sixty-eight".