513947 has 4 divisors (see below), whose sum is σ = 587376. Its totient is φ = 440520.

The previous prime is 513943. The next prime is 513977. The reversal of 513947 is 749315.

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 513947 - 2² = 513943 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 513947.

It is not an unprimeable number, because it can be changed into a prime (513943) 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, 36704 + ... + 36717.

It is an arithmetic number, because the mean of its divisors is an integer number (146844).

2⁵¹³⁹⁴⁷ is an apocalyptic number.

513947 is a deficient number, since it is larger than the sum of its proper divisors (73429).

513947 is an equidigital number, since it uses as much as digits as its factorization.

513947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73428.

The product of its digits is 3780, while the sum is 29.

The square root of 513947 is about 716.9009694512. The cubic root of 513947 is about 80.1012779805.

The spelling of 513947 in words is "five hundred thirteen thousand, nine hundred forty-seven".