686847373 has 4 divisors (see below), whose sum is σ = 698107228. Its totient is φ = 675587520.

The previous prime is 686847361. The next prime is 686847407. The reversal of 686847373 is 373748686.

686847373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92121604 + 594725769 = 9598^2 + 24387^2 .

It is a cyclic number.

It is not a de Polignac number, because 686847373 - 2⁵ = 686847341 is a prime.

It is a super-2 number, since 2×686847373² = 943518627594002258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 686847373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686847313) 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, 5629836 + ... + 5629957.

It is an arithmetic number, because the mean of its divisors is an integer number (174526807).

Almost surely, 2^686847373 is an apocalyptic number.

It is an amenable number.

686847373 is a deficient number, since it is larger than the sum of its proper divisors (11259855).

686847373 is a wasteful number, since it uses less digits than its factorization.

686847373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11259854.

The product of its digits is 4064256, while the sum is 52.

The square root of 686847373 is about 26207.7731408069. The cubic root of 686847373 is about 882.3077226107.

The spelling of 686847373 in words is "six hundred eighty-six million, eight hundred forty-seven thousand, three hundred seventy-three".