6813523 has 4 divisors (see below), whose sum is σ = 6818760. Its totient is φ = 6808288.

The previous prime is 6813511. The next prime is 6813529. The reversal of 6813523 is 3253186.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6813523 - 2⁵ = 6813491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6813491 and 6813500.

It is not an unprimeable number, because it can be changed into a prime (6813529) 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, 1008 + ... + 3826.

It is an arithmetic number, because the mean of its divisors is an integer number (1704690).

Almost surely, 2^6813523 is an apocalyptic number.

6813523 is a deficient number, since it is larger than the sum of its proper divisors (5237).

6813523 is a wasteful number, since it uses less digits than its factorization.

6813523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236.

The product of its digits is 4320, while the sum is 28.

The square root of 6813523 is about 2610.2725911291. The cubic root of 6813523 is about 189.5791516152.

The spelling of 6813523 in words is "six million, eight hundred thirteen thousand, five hundred twenty-three".