686473 has 2 divisors, whose sum is σ = 686474. Its totient is φ = 686472.

The previous prime is 686453. The next prime is 686479. The reversal of 686473 is 374686.

686473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499849 + 186624 = 707^2 + 432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686473 is a prime.

686473 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (686479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343236 + 343237.

It is an arithmetic number, because the mean of its divisors is an integer number (343237).

2⁶⁸⁶⁴⁷³ is an apocalyptic number.

It is an amenable number.

686473 is a deficient number, since it is larger than the sum of its proper divisors (1).

686473 is an equidigital number, since it uses as much as digits as its factorization.

686473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 686473 is about 828.5366618322. The cubic root of 686473 is about 88.2147389940.

The spelling of 686473 in words is "six hundred eighty-six thousand, four hundred seventy-three".