689534 has 8 divisors (see below), whose sum is σ = 1044120. Its totient is φ = 341496.

The previous prime is 689509. The next prime is 689551. The reversal of 689534 is 435986.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 689494 and 689503.

It is a congruent number.

It is an unprimeable number.

689534 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1364 + ... + 1799.

It is an arithmetic number, because the mean of its divisors is an integer number (130515).

2⁶⁸⁹⁵³⁴ is an apocalyptic number.

689534 is a deficient number, since it is larger than the sum of its proper divisors (354586).

689534 is a wasteful number, since it uses less digits than its factorization.

689534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274.

The product of its digits is 25920, while the sum is 35.

The square root of 689534 is about 830.3818398785. The cubic root of 689534 is about 88.3456618211.

The spelling of 689534 in words is "six hundred eighty-nine thousand, five hundred thirty-four".