688099 has 4 divisors (see below), whose sum is σ = 701136. Its totient is φ = 675064.

The previous prime is 688097. The next prime is 688111. The reversal of 688099 is 990886.

It is a happy number.

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 688099 - 2¹ = 688097 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688097) 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, 6439 + ... + 6544.

It is an arithmetic number, because the mean of its divisors is an integer number (175284).

2⁶⁸⁸⁰⁹⁹ is an apocalyptic number.

688099 is a deficient number, since it is larger than the sum of its proper divisors (13037).

688099 is a wasteful number, since it uses less digits than its factorization.

688099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13036.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 688099 is about 829.5173295357. The cubic root of 688099 is about 88.2843334110.

The spelling of 688099 in words is "six hundred eighty-eight thousand, ninety-nine".