686168273 has 4 divisors (see below), whose sum is σ = 784192320. Its totient is φ = 588144228.

The previous prime is 686168233. The next prime is 686168279. The reversal of 686168273 is 372861686.

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 not a de Polignac number, because 686168273 - 2¹⁶ = 686102737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (686168279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49012013 + ... + 49012026.

It is an arithmetic number, because the mean of its divisors is an integer number (196048080).

Almost surely, 2^686168273 is an apocalyptic number.

It is an amenable number.

686168273 is a deficient number, since it is larger than the sum of its proper divisors (98024047).

686168273 is an equidigital number, since it uses as much as digits as its factorization.

686168273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98024046.

The product of its digits is 580608, while the sum is 47.

The square root of 686168273 is about 26194.8138569450. The cubic root of 686168273 is about 882.0168415121.

The spelling of 686168273 in words is "six hundred eighty-six million, one hundred sixty-eight thousand, two hundred seventy-three".