689717 has 8 divisors (see below), whose sum is σ = 809856. Its totient is φ = 574992.

The previous prime is 689713. The next prime is 689723. The reversal of 689717 is 717986.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 689717 - 2² = 689713 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1073 + ... + 1590.

It is an arithmetic number, because the mean of its divisors is an integer number (101232).

2⁶⁸⁹⁷¹⁷ is an apocalyptic number.

It is an amenable number.

689717 is a deficient number, since it is larger than the sum of its proper divisors (120139).

689717 is a wasteful number, since it uses less digits than its factorization.

689717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707.

The product of its digits is 21168, while the sum is 38.

The square root of 689717 is about 830.4920228395. The cubic root of 689717 is about 88.3534766767.

The spelling of 689717 in words is "six hundred eighty-nine thousand, seven hundred seventeen".