1972 and Paul numbers

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1972 е единственото число, с идентични цифри в числото и множителите, които са прости числа. 1972 = 2 × 2 × 17 × 29.

ПЧ#294 = 1973. 

1972 = 6^2 + 44^2 = 26^2 + 36^2.

12+17+19+21+27+29+71+72+79+91+92+97 = 627 = 33 × 19

127 = PR#27, 172 = 4 × 43, 217 = 7 × 031, 

271 = PR#56, 712 = 8 × 89, 721 = 7 × 103.

129 = 3 × 43, 192 = 16 × 04 × 3, 219 = 3 × 073,

291 = 3 × 97, 912 = 16 × 19 × 3, 921 = 3 × 307.

179 = PR # 37, 197 = PR # 41, 719 = PR#124,

791 = 113 × 7, 917 = 7 × 131, 971 = PR#160.

279 = 3 × 3 × 031, 297 = 3 × 3 × 3 × 11, 729 = 3 × 3 × 3 × 3 × 3 × 3

927 = 3 × 3 × 103, 792 = 8 × 3 × 3 × 11, 972 = 4 × 3 × 3 × 3 × 3 × 3

1279 = PR#203

1297 = PR#207

1729 = 7 × 13 × 19

1792 = 256 × 7

1927 = 41 × 47

1972 = 4 × 17 × 29

2179 = PR#323

2197 = 13 × 13 × 13

2719 = PR#393 = 3*131

2791 = PR#402 = 67*6

2917 = PR#418 = 2*11*19

2971 = PR#425 = 25*17

7129 = PR#910 = 2 * 5 * 7 * 13

7192 = 8 × 29 × 31

7219 = PR#919 (919=PR#153)

7291 = 23 × 317=PR#62

7912 = 8 × 23 × 43 (PR#5+10)

7921 = 89 × 89=PR#20

9127 = PR#1127

9172 = 4 × 2293=PR#336

9217 = 13 × 709=PR#2+123

9271 = 73 × 127=PR#17+27

9712 = 16 × 607=PR#107

9721 = PR#1195

126654 = 606 × 19 × 11

12654 = 6 × 19 × 111

627 = 3 × 19 × 11

126654 +12654 + 627 = 139935 = 3 × 5 × 19 × 491

11 - Primes, 1+2+7+9 = 19, 1*9*7*2 = 126 , 21 + 79 = 100

1972 = 4 × 17 × 29

1975 = 5 ×   5 × 79, 1975,5 = 45 × 439.

1976 = 8 × 13 × 19, 1975,6 = 44 × 449.

1972 = 4*17*29

1) 1*9*7*2 = 126 (126 - 50 = 76)

2) 4+17+29 = 50 (26 + 50 = 76)

3) (2179 = PR#323) 3*23 = 69 > 3,5 (50 + 19 = 69)

4) 04 (1792 = 4^4 × 7) Надолу са множителите

5) 07 (1927 = 41 × 47)

6) 47 (2917 = PR#417)

7) 68 = 4*17, (4 + 7 + 47 + 68 = 126)

8) 76 = 4*19, (9721 = PR#1195)