688339 has 2 divisors, whose sum is σ = 688340. Its totient is φ = 688338.

The previous prime is 688333. The next prime is 688357. The reversal of 688339 is 933886.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688339 - 2¹⁹ = 164051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 688298 and 688307.

It is not a weakly prime, because it can be changed into another prime (688333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344169 + 344170.

It is an arithmetic number, because the mean of its divisors is an integer number (344170).

2⁶⁸⁸³³⁹ is an apocalyptic number.

688339 is a deficient number, since it is larger than the sum of its proper divisors (1).

688339 is an equidigital number, since it uses as much as digits as its factorization.

688339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 688339 is about 829.6619793627. The cubic root of 688339 is about 88.2945963611.

The spelling of 688339 in words is "six hundred eighty-eight thousand, three hundred thirty-nine".