686812713 has 16 divisors (see below), whose sum is σ = 949363200. Its totient is φ = 441136640.

The previous prime is 686812681. The next prime is 686812747. The reversal of 686812713 is 317218686.

It is a cyclic number.

It is not a de Polignac number, because 686812713 - 2⁵ = 686812681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (686812793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33433 + ... + 49913.

It is an arithmetic number, because the mean of its divisors is an integer number (59335200).

Almost surely, 2^686812713 is an apocalyptic number.

It is an amenable number.

686812713 is a deficient number, since it is larger than the sum of its proper divisors (262550487).

686812713 is a wasteful number, since it uses less digits than its factorization.

686812713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16992.

The product of its digits is 96768, while the sum is 42.

The square root of 686812713 is about 26207.1118782669. Note that the first 3 decimals coincide. The cubic root of 686812713 is about 882.2928812251.

The spelling of 686812713 in words is "six hundred eighty-six million, eight hundred twelve thousand, seven hundred thirteen".