686777317 has 8 divisors (see below), whose sum is σ = 709237760. Its totient is φ = 664336080.

The previous prime is 686777297. The next prime is 686777321. The reversal of 686777317 is 713777686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 686777317 - 2¹¹ = 686775269 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 (686777327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118663 + ... + 124315.

It is an arithmetic number, because the mean of its divisors is an integer number (88654720).

Almost surely, 2^686777317 is an apocalyptic number.

It is an amenable number.

686777317 is a deficient number, since it is larger than the sum of its proper divisors (22460443).

686777317 is a wasteful number, since it uses less digits than its factorization.

686777317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9603.

The product of its digits is 2074464, while the sum is 52.

The square root of 686777317 is about 26206.4365566935. The cubic root of 686777317 is about 882.2777241696.

The spelling of 686777317 in words is "six hundred eighty-six million, seven hundred seventy-seven thousand, three hundred seventeen".