79

Basic Information

Cardinal Number

seventy-nine

Ordinal Number

seventy ninth

Roman Numeral

LXXIX

Greek Numeral

ΟΘ´

Factorization

79

Standard Form

7.9 × 10¹

Different Representations

Binary Form

1001111₂

Ternary Form

2221₃

Quaternary Form

1033₄

Quinary Form

304₅

Senary Form

211₆

Septenary Form

142₇

Octal Form

117₈

Nonary Form

87₉

Undecimal Form

72₁₁

Duodecimal Form

67₁₂

Tridecimal Form

61₁₃

Quattuordecimal Form

59₁₄

Quindecimal Form

54₁₅

Hexadecimal Form

4F₁₆

Septendecimal Form

4B₁₇

Octodecimal Form

47₁₈

Novemdecimal Form

43₁₉

Vigesimal Form

3J₂₀

Unvigesimal Form

3G₂₁

Duovigesimal Form

3D₂₂

Trevigesimal Form

3A₂₃

Quattuorvigesimal Form

37₂₄

Quinvigesimal Form

34₂₅

Hexavigesimal Form

31₂₆

Septenvigesimal Form

2P₂₇

Octovigesimal Form

2N₂₈

Novemvigesimal Form

2L₂₉

Trigesimal Form

2J₃₀

Untrigesimal Form

2H₃₁

Duotrigesimal Form

2F₃₂

Tretrigesimal Form

2D₃₃

Quattuortrigesimal Form

2B₃₄

Quintrigesimal Form

29₃₅

Hexatrigesimal Form

27₃₆

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73	79	83

79 is a prime number from 1-100. 79 has 2 factors, 1 and 79. It is the 22nd prime number and the 22nd prime number from 1-100.

Proofs[]

— 79 is divisible by 1.

— 79 is not divisible by 2-78.

— 79 is divisible by 79.

Therefore, 79 has two factors and is prime.

As an Exponent of Mersenne Number[]

2⁷⁹ - 1 is divisible by 2,687, and is therefore not a prime number.

Relationship with other odd numbers[]

The numbers before[]

73 is the previous prime number.
- The difference between 79 and 73 is 6. Therefore, they are sexy primes.
75 is a composite number; its prime factorization is 3 * 5².
77 is also a composite number; its prime factorization is 7 * 11.

The numbers after[]

81 is the next odd number. It is a composite number; its prime factorization is 3⁴.
83 is the next prime number.
- The difference between 83 and 79 is 4. Therefore, they are cousin primes.
85 is a composite number; its prime factorization is 5 * 17.

In science[]

79 is the atomic number of gold.

Trivia[]

79 is an emirp, since its reverse, 97, is also prime.
The decimal expansion of ${\frac {1}{79}}$ gives Pell numbers, similar to how the decimal expansion of ${\frac {1}{89}}$ gives Fibonacci numbers.
79 is a Leyland prime of the second kind, of the form 2⁷ - 7².

Navigation[]

Prime Numbers 1-1,000

1-100
1-25	2 • 3 • 5 • 7 • 11 • 13 • 17 • 19 • 23
26-50	29 • 31 • 37 • 41 • 43 • 47
51-75	53 • 59 • 61 • 67 • 71 • 73
76-100	79 • 83 • 89 • 97

101-200
101-125	101 • 103 • 107 • 109 • 113
126-150	127 • 131 • 137 • 139 • 149
151-175	151 • 157 • 163 • 167 • 173
176-200	179 • 181 • 191 • 193 • 197 • 199

201-400
201-250	211 • 223 • 227 • 229 • 233 • 239 • 241
250-300	251 • 257 • 263 • 269 • 271 • 277 • 281 • 283 • 293
301-350	307 • 311 • 313 • 317 • 331 • 337 • 347 • 349
351-400	353 • 359 • 367 • 373 • 379 • 383 • 389 • 397

401-600
401-450	401 • 409 • 419 • 421 • 431 • 433 • 439 • 443 • 449
450-500	457 • 461 • 463 • 467 • 479 • 487 • 491 • 499
501-550	503 • 509 • 521 • 523 • 541 • 547
551-600	557 • 563 • 569 • 571 • 577 • 587 • 593 • 599

601-800
601-650	601 • 607 • 613 • 617 • 619 • 631 • 641 • 643 • 647
651-700	653 • 659 • 661 • 673 • 677 • 683 • 691
701-750	701 • 709 • 719 • 727 • 733 • 739 • 743
751-800	751 • 757 • 761 • 769 • 773 • 787 • 797

801-1,000
801-850	809 • 811 • 821 • 823 • 827 • 829 • 839
851-900	853 • 857 • 859 • 863 • 877 • 881 • 883 • 887
901-950	907 • 911 • 919 • 929 • 937 • 941 • 947
951-1000	953 • 967 • 971 • 977 • 983 • 991 • 997