689045 has 8 divisors (see below), whose sum is σ = 945024. Its totient is φ = 472464.

The previous prime is 689041. The next prime is 689063. The reversal of 689045 is 540986.

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 689045 - 2² = 689041 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 (689041) 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, 9809 + ... + 9878.

It is an arithmetic number, because the mean of its divisors is an integer number (118128).

2⁶⁸⁹⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

689045 is a deficient number, since it is larger than the sum of its proper divisors (255979).

689045 is a wasteful number, since it uses less digits than its factorization.

689045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19699.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 689045 is about 830.0873448017. The cubic root of 689045 is about 88.3247727157.

The spelling of 689045 in words is "six hundred eighty-nine thousand, forty-five".