The number 89 is also the Gematria of the name of the holiday of Chanuka, which kabbalistically corresponds to the Sephira of Hod. The word Hod/splendor is the Gematria of 15, and the total phrase Na Nach Nachma Nachman Meuman (in Hebrew of course) which is the phrase that is always sung contains a total of 15 letters! And as mentioned in Gemara Berachos, Hod corresponds to the Beis HaMikdosh, about which we constantly pray for it to be rebuilt - "Sheyibaneh Beis HaMikdosh", just as the above verse that speaks of the first Sephira of Chesed - Olam Chesed Yibaneh "The world WILL BE BUILT with kindness", even though in one sense, the world was indeed created by Hashem and sustained in the merit of His kindness until the Torah was given, but this is the FUTURE TENSE of the world that WILL be built in the future with kindness as noted in this teaching of Likutei Moharan that through Hashem's name as related to 72 (10+15+21+26), there will be a novelty of the world in the future. And as Chesed is the 1st Sephira and Hod is the 5th Sephira, when you put these two numbers together, that is, one & five (1&5), it becomes the number 15, the same Gematria as Hod, which corresponds to the Beis HaMikdash, the holiest place of the world.
(NOTE: The Breslover Ben-Yosef Livnat HY"D who was murdered by bloodthirsty Arabs at Kever Yosef three months ago died as a Kadosh on the 5th day of the Sephira which represents Hod She'B'Chesed - Hod within Chesed, just as the Beis Hamikdash - the holiest place of the world - that corresponds with Hod is within this world that will be built with Chesed. Similarly, this Breslover as murdered by Arabs became a Kadosh "Holy" a term marked especially for others who Lo Aleinu had the same thing happen to them. His last name Livnat, can also be read with different vowels to read Livnot - "to build" - implying a future tense of building in the future! To note, this happened in the midst of the 89th year from when the Petek was discovered, noting that the concept of the world being rebuilt with kindness is mentioned in the 89th Psalm.)
For today's Gematria special - I decided to see what number results when multiplying these four dimensions of Hashem's name as Y=10, YK-15, YKV=21, YKVK=26; hence 10*15*21*26=81,900. Now, the letters to spell the number 81,900 in Hebrew are - Pei, Alef, Tav, Tav, Koof. When you rearrange these five letters as two words, this can be read as Os Petek - SIGN OF PETEK! (Sometimes, the word Os - sign, is spelled with a Vav in the middle, and sometimes without as for example in Shemos 4:8). Hence, Hashem's name as spelled in this positioning as mentioned in Tikunei Zohar hints to the future name of Rabbeinu to be spelled the same way as it would occur in the Petek!
On a personal note, I am in the midst of my 510th month from birth. Similarly, the word Shir is the Gematria of 510, and the phrase Shir Chadash can be reread in Hebrew using only different vowels to read Shir Chodesh or as Chodesh Shir - the 510th month!