689673 has 8 divisors (see below), whose sum is σ = 973728. Its totient is φ = 432704.

The previous prime is 689641. The next prime is 689693. The reversal of 689673 is 376986.

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 689673 - 2⁵ = 689641 is a prime.

It is a d-powerful number, because it can be written as 6² + 8⁵ + 6⁵ + 9⁶ + 7⁶ + 3 .

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (689603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6711 + ... + 6812.

It is an arithmetic number, because the mean of its divisors is an integer number (121716).

2⁶⁸⁹⁶⁷³ is an apocalyptic number.

It is an amenable number.

689673 is a deficient number, since it is larger than the sum of its proper divisors (284055).

689673 is a wasteful number, since it uses less digits than its factorization.

689673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13543.

The product of its digits is 54432, while the sum is 39.

The square root of 689673 is about 830.4655320963. The cubic root of 689673 is about 88.3515978213.

The spelling of 689673 in words is "six hundred eighty-nine thousand, six hundred seventy-three".