686903317 has 4 divisors (see below), whose sum is σ = 686974336. Its totient is φ = 686832300.

The previous prime is 686903197. The next prime is 686903359. The reversal of 686903317 is 713309686.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686903317 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 (686903387) 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, 18183 + ... + 41284.

It is an arithmetic number, because the mean of its divisors is an integer number (171743584).

Almost surely, 2^686903317 is an apocalyptic number.

It is an amenable number.

686903317 is a deficient number, since it is larger than the sum of its proper divisors (71019).

686903317 is a wasteful number, since it uses less digits than its factorization.

686903317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71018.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 686903317 is about 26208.8404360056. The cubic root of 686903317 is about 882.3316767356.

The spelling of 686903317 in words is "six hundred eighty-six million, nine hundred three thousand, three hundred seventeen".