689843 has 24 divisors (see below), whose sum is σ = 943104. Its totient is φ = 489600.

The previous prime is 689831. The next prime is 689851. The reversal of 689843 is 348986.

689843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 689843 - 2⁴ = 689827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689797 and 689806.

It is not an unprimeable number, because it can be changed into a prime (689803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22238 + ... + 22268.

It is an arithmetic number, because the mean of its divisors is an integer number (39296).

2⁶⁸⁹⁸⁴³ is an apocalyptic number.

689843 is a deficient number, since it is larger than the sum of its proper divisors (253261).

689843 is a wasteful number, since it uses less digits than its factorization.

689843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 66 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 689843 is about 830.5678780208. The cubic root of 689843 is about 88.3588565935.

The spelling of 689843 in words is "six hundred eighty-nine thousand, eight hundred forty-three".