680623 has 2 divisors, whose sum is σ = 680624. Its totient is φ = 680622.

The previous prime is 680611. The next prime is 680633. The reversal of 680623 is 326086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 680623 - 2¹⁷ = 549551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680633) 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 as a sum of consecutive naturals, namely, 340311 + 340312.

It is an arithmetic number, because the mean of its divisors is an integer number (340312).

2⁶⁸⁰⁶²³ is an apocalyptic number.

680623 is a deficient number, since it is larger than the sum of its proper divisors (1).

680623 is an equidigital number, since it uses as much as digits as its factorization.

680623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 680623 is about 824.9987878779. The cubic root of 680623 is about 87.9634403919.

The spelling of 680623 in words is "six hundred eighty thousand, six hundred twenty-three".