513847 has 4 divisors (see below), whose sum is σ = 520960. Its totient is φ = 506736.

The previous prime is 513841. The next prime is 513871. The reversal of 513847 is 748315.

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 513847 - 2³ = 513839 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 (513841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3447 + ... + 3592.

It is an arithmetic number, because the mean of its divisors is an integer number (130240).

2⁵¹³⁸⁴⁷ is an apocalyptic number.

513847 is a deficient number, since it is larger than the sum of its proper divisors (7113).

513847 is an equidigital number, since it uses as much as digits as its factorization.

513847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7112.

The product of its digits is 3360, while the sum is 28.

The square root of 513847 is about 716.8312214183. The cubic root of 513847 is about 80.0960824724.

The spelling of 513847 in words is "five hundred thirteen thousand, eight hundred forty-seven".