686184977317 has 4 divisors (see below), whose sum is σ = 784211402656. Its totient is φ = 588158551980.

The previous prime is 686184977297. The next prime is 686184977341. The reversal of 686184977317 is 713779481686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 686184977317 - 2²³ = 686176588709 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 (686184977117) 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, 49013212659 + ... + 49013212672.

It is an arithmetic number, because the mean of its divisors is an integer number (196052850664).

Almost surely, 2^686184977317 is an apocalyptic number.

It is an amenable number.

686184977317 is a deficient number, since it is larger than the sum of its proper divisors (98026425339).

686184977317 is an equidigital number, since it uses as much as digits as its factorization.

686184977317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98026425338.

The product of its digits is 85349376, while the sum is 67.

The spelling of 686184977317 in words is "six hundred eighty-six billion, one hundred eighty-four million, nine hundred seventy-seven thousand, three hundred seventeen".