689493 has 8 divisors (see below), whose sum is σ = 1050688. Its totient is φ = 393984.

The previous prime is 689467. The next prime is 689509. The reversal of 689493 is 394986.

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

It is not a de Polignac number, because 689493 - 2⁵ = 689461 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689093) 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, 16396 + ... + 16437.

It is an arithmetic number, because the mean of its divisors is an integer number (131336).

2⁶⁸⁹⁴⁹³ is an apocalyptic number.

It is an amenable number.

689493 is a deficient number, since it is larger than the sum of its proper divisors (361195).

689493 is a wasteful number, since it uses less digits than its factorization.

689493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32843.

The product of its digits is 46656, while the sum is 39.

The square root of 689493 is about 830.3571520737. The cubic root of 689493 is about 88.3439107622.

The spelling of 689493 in words is "six hundred eighty-nine thousand, four hundred ninety-three".