689143 has 8 divisors (see below), whose sum is σ = 848288. Its totient is φ = 545184.

The previous prime is 689141. The next prime is 689167. The reversal of 689143 is 341986.

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 689143 - 2¹ = 689141 is a prime.

689143 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689141) 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, 3696 + ... + 3877.

It is an arithmetic number, because the mean of its divisors is an integer number (106036).

2⁶⁸⁹¹⁴³ is an apocalyptic number.

689143 is a deficient number, since it is larger than the sum of its proper divisors (159145).

689143 is a wasteful number, since it uses less digits than its factorization.

689143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7593.

The product of its digits is 5184, while the sum is 31.

The square root of 689143 is about 830.1463726356. The cubic root of 689143 is about 88.3289598721.

The spelling of 689143 in words is "six hundred eighty-nine thousand, one hundred forty-three".