686451713 has 4 divisors (see below), whose sum is σ = 705004500. Its totient is φ = 667898928.

The previous prime is 686451691. The next prime is 686451719. The reversal of 686451713 is 317154686.

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 665227264 + 21224449 = 25792^2 + 4607^2 .

It is a cyclic number.

It is not a de Polignac number, because 686451713 - 2⁸ = 686451457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686451719) 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, 9276338 + ... + 9276411.

It is an arithmetic number, because the mean of its divisors is an integer number (176251125).

Almost surely, 2^686451713 is an apocalyptic number.

It is an amenable number.

686451713 is a deficient number, since it is larger than the sum of its proper divisors (18552787).

686451713 is a wasteful number, since it uses less digits than its factorization.

686451713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18552786.

The product of its digits is 120960, while the sum is 41.

The square root of 686451713 is about 26200.2235295808. The cubic root of 686451713 is about 882.1382716085.

The spelling of 686451713 in words is "six hundred eighty-six million, four hundred fifty-one thousand, seven hundred thirteen".