688343 has 4 divisors (see below), whose sum is σ = 692328. Its totient is φ = 684360.

The previous prime is 688339. The next prime is 688357. The reversal of 688343 is 343886.

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 688343 - 2² = 688339 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 (688333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1721 + ... + 2082.

It is an arithmetic number, because the mean of its divisors is an integer number (173082).

2⁶⁸⁸³⁴³ is an apocalyptic number.

688343 is a deficient number, since it is larger than the sum of its proper divisors (3985).

688343 is a wasteful number, since it uses less digits than its factorization.

688343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3984.

The product of its digits is 13824, while the sum is 32.

The square root of 688343 is about 829.6643899795. The cubic root of 688343 is about 88.2947673900.

The spelling of 688343 in words is "six hundred eighty-eight thousand, three hundred forty-three".