686423 has 2 divisors, whose sum is σ = 686424. Its totient is φ = 686422.

The previous prime is 686417. The next prime is 686437. The reversal of 686423 is 324686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 686423 - 2⁶ = 686359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343211 + 343212.

It is an arithmetic number, because the mean of its divisors is an integer number (343212).

2⁶⁸⁶⁴²³ is an apocalyptic number.

686423 is a deficient number, since it is larger than the sum of its proper divisors (1).

686423 is an equidigital number, since it uses as much as digits as its factorization.

686423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 686423 is about 828.5064876028. The cubic root of 686423 is about 88.2125972035.

The spelling of 686423 in words is "six hundred eighty-six thousand, four hundred twenty-three".