On the Number 13

The 7th odd number = 1, 3, 5, 7, 9, 11, 13

The 6th prime number = 2, 3, 5, 7, 11, 13

The 7th Fibonacci number = 1, 1, 2, 3, 5, 8, 13
(Leonardo Pisano Fibonacci, 1170-1250)

The 5th lucky number = 1, 3, 7, 9, 13

Sum of the 2nd & 3rd square numbers = 2² + 3² = 4 + 9 = 13

Sum of the 1st perfect number & 4th prime number = 6 + 7 = 13

The 13th digit of pi = 7

The 110th & 111th digits of pi = 13

The 56th & 57th digits of phi = 13

10)

Atomic Number of Aluminum (Al) = 13

11)

Carbon-13 (¹³C) has a nuclear spin due to an unpaired neutron.
Carbon-13 nuclei make up approximately 1% of the carbon nuclei on earth.

12)

Traditional gift for 13th wedding anniversary is lace.

13)

Number of the same suit in a deck of playing cards

= 13

14)

Number of chapters in Nehemiah = 13

15)

Verse 13 of Chapter 13 in Saint Paul's I Corinthians:
“And now abides Faith, Hope, Love, these three— but the greatest of these is Love.”

16)

Number of chapters in Saint Paul's II Corinthians = 13

17)

Number of chapters in Saint Paul's Epistle to the Hebrews = 13

18)

The 13th day of the year = January 13
Salmon Chase (1808-1873) was born on this day. He was Treasury Secretary under Lincoln (1861-1864)
and Chief Justice of the Supreme Court (1864-1873). Chase appears on the United States' $10,000 bill.

19)

13th word of the King James Version of the Bible's Old Testament Genesis = earth
1: In the beginning God created the heaven and the earth.
2: And the earth was without form, and void; and darkness was upon the face of the deep.
— Genesis I.1-2 (1611)

20)

13th Hexagram of the I Ching: (T'ung Jen/Fellowship)

THE IMAGE:
Heaven together with fire:
The image of FELLOWSHIP WITH MEN.
Thus the superior man organizes the clans
And makes distinctions between things.

21)

The hypotenuse of the Pythagorean 5-12-13 triangle = 13

22)

Chou Tun-Yi (1017-1073), Penetrating Book of Changes, Chapter 13:
“Ceremonies establish order and music makes harmony.
Only when yin & yang operate according to order can they be in harmony...
All things must fulfill their principle before they are in harmony.
Therefore ceremonies come first and music afterward.”

23)

13th line in Dante's Paradiso is an invocation to Apollo, the God of Poetry:

O buono Appollo, a l'ultimo lavoro
fammi del tuo valor sì fatto vaso,
come dimandi a dar l'amato alloro.

O good Apollo, for this final task
make me the vessel of your excellence,
what you, to merit your loved laurel, ask.

Paradiso I.13-16 (Allen Mandelbaum translation, 1980)

24)

13 and 13th occur 15 & 11 times respectively in the Old Testament.
They are not mentioned at all in the New Testament Bible. (See Bible Concordance).

25)

Ezekiel 40.11:
And he measured the breadth of the entry of the gate,
ten cubits; and the length of the gate, thirteen cubits.

26)

Number of sectors on a 5-1/4 inch floppy disk = 13

27)

Number of bumps in the counterclockwise spirals of a pineapple = 13
(See Fibonacci Numbers in Nature)

28)

Triskaidekaphobia is the irrational fear of the number 13, especially if the date falls on Friday 13th
(Paul Hoffman, "Triskaidekaphobia" in Smithsonian Magazine, February 1987)

29)

Leonardo da Vinci's The Last Supper (1498) shows Christ with his 12 Apostles.
This may be the original superstition why 13 dining at a table brings bad luck.
Also hotels do not have a Room 13 and buildings do not have a 13th floor.

30)

Number of petals in Black-Eyed Susans, Corn Marigolds, and Ragworts = 13

31)

U. S. flag had 13 stars & 13 stripes (1777-1795)

Resolved: that the flag of the United States be 13 stripes,
alternate red and white; that the union be 13 stars,
white in a blue field, representing a new constellation.
— adopted June 14, 1777 by the
2nd Continental Congress at Philadelphia

32)

13's in the Great Seal of the United States

1. 13 stars in the crest
2. 13 stripes in the shield
3. 13 olive leaves
4. 13 olives
5. 13 arrows
6. 13 letters in Annuit Coeptis
7. 13 letters in E Pluribus Unum
8. 13 courses of stone in the Pyramid

33)

Numerology: words whose letters add up to 13

ATMAN: 1 + 2 + 4 + 1 + 5 = 13 (Sanskrit: self)

JNANA: 1 + 5 + 1 + 5 + 1 = 13 (Sanskrit: knowledge)

SOUL: 1 + 6 + 3 + 3 = 13

STAR: 1 + 2 + 1 + 9 = 13

TWO: 2 + 5 + 6 = 13

WORLD MIND: (5 + 6 + 9 + 3 + 4) + (4 + 9 + 5 + 4) = 27 + 22 = 49 = 4 + 9 = 13

YES: 7 + 5 + 1 = 13