686184013 has 4 divisors (see below), whose sum is σ = 695583868. Its totient is φ = 676784160.

The previous prime is 686184011. The next prime is 686184017. The reversal of 686184013 is 310481686.

686184013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 536292964 + 149891049 = 23158^2 + 12243^2 .

It is a cyclic number.

It is not a de Polignac number, because 686184013 - 2¹ = 686184011 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 (686184011) 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, 4699818 + ... + 4699963.

It is an arithmetic number, because the mean of its divisors is an integer number (173895967).

Almost surely, 2^686184013 is an apocalyptic number.

It is an amenable number.

686184013 is a deficient number, since it is larger than the sum of its proper divisors (9399855).

686184013 is an equidigital number, since it uses as much as digits as its factorization.

686184013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9399854.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 686184013 is about 26195.1142963721. The cubic root of 686184013 is about 882.0235856494.

The spelling of 686184013 in words is "six hundred eighty-six million, one hundred eighty-four thousand, thirteen".