680443 has 2 divisors, whose sum is σ = 680444. Its totient is φ = 680442.

The previous prime is 680441. The next prime is 680453. The reversal of 680443 is 344086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680443 - 2¹ = 680441 is a prime.

Together with 680441, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (680441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340221 + 340222.

It is an arithmetic number, because the mean of its divisors is an integer number (340222).

2⁶⁸⁰⁴⁴³ is an apocalyptic number.

680443 is a deficient number, since it is larger than the sum of its proper divisors (1).

680443 is an equidigital number, since it uses as much as digits as its factorization.

680443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 680443 is about 824.8896895949. The cubic root of 680443 is about 87.9556853326.

The spelling of 680443 in words is "six hundred eighty thousand, four hundred forty-three".