513878 has 4 divisors (see below), whose sum is σ = 770820. Its totient is φ = 256938.

The previous prime is 513871. The next prime is 513881. The reversal of 513878 is 878315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878315 = 5 ⋅175663.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 513878.

It is not an unprimeable number, because it can be changed into a prime (513871) 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 as a sum of consecutive naturals, namely, 128468 + ... + 128471.

It is an arithmetic number, because the mean of its divisors is an integer number (192705).

2⁵¹³⁸⁷⁸ is an apocalyptic number.

513878 is a deficient number, since it is larger than the sum of its proper divisors (256942).

513878 is a wasteful number, since it uses less digits than its factorization.

513878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256941.

The product of its digits is 6720, while the sum is 32.

The square root of 513878 is about 716.8528440343. The cubic root of 513878 is about 80.0976931520.

The spelling of 513878 in words is "five hundred thirteen thousand, eight hundred seventy-eight".