680423 has 4 divisors (see below), whose sum is σ = 682248. Its totient is φ = 678600.

The previous prime is 680417. The next prime is 680431. The reversal of 680423 is 324086.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 680423 - 2¹⁸ = 418279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128 + ... + 1173.

It is an arithmetic number, because the mean of its divisors is an integer number (170562).

2⁶⁸⁰⁴²³ is an apocalyptic number.

680423 is a deficient number, since it is larger than the sum of its proper divisors (1825).

680423 is a wasteful number, since it uses less digits than its factorization.

680423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 680423 is about 824.8775666728. The cubic root of 680423 is about 87.9548235749.

The spelling of 680423 in words is "six hundred eighty thousand, four hundred twenty-three".