686354271 has 16 divisors (see below), whose sum is σ = 964631040. Its totient is φ = 432889920.

The previous prime is 686354197. The next prime is 686354299. The reversal of 686354271 is 172453686.

It is not a de Polignac number, because 686354271 - 2¹³ = 686346079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686354171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35466 + ... + 51288.

It is an arithmetic number, because the mean of its divisors is an integer number (60289440).

Almost surely, 2^686354271 is an apocalyptic number.

686354271 is a deficient number, since it is larger than the sum of its proper divisors (278276769).

686354271 is a wasteful number, since it uses less digits than its factorization.

686354271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16606.

The product of its digits is 241920, while the sum is 42.

The square root of 686354271 is about 26198.3638992972. The cubic root of 686354271 is about 882.0965297140.

The spelling of 686354271 in words is "six hundred eighty-six million, three hundred fifty-four thousand, two hundred seventy-one".