688543 has 2 divisors, whose sum is σ = 688544. Its totient is φ = 688542.

The previous prime is 688531. The next prime is 688561. The reversal of 688543 is 345886.

688543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688543 - 2⁵ = 688511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 688499 and 688508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344271 + 344272.

It is an arithmetic number, because the mean of its divisors is an integer number (344272).

2⁶⁸⁸⁵⁴³ is an apocalyptic number.

688543 is a deficient number, since it is larger than the sum of its proper divisors (1).

688543 is an equidigital number, since it uses as much as digits as its factorization.

688543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 34.

The square root of 688543 is about 829.7849118898. The cubic root of 688543 is about 88.3033179932.

The spelling of 688543 in words is "six hundred eighty-eight thousand, five hundred forty-three".