Interesting Number Part 5

 

Interesting Number # 41 is 91

This interesting number is 91.

91 is a triangle number.

91 is the 27^th distinct semiprime.

The code of international direct dial phone calls to India is 91.

The number 91 is an odd number.

The factors of 91 are 1, 7, 13, and 91 – so 91 is divisible by 4 numbers.

The only prime factors of 91 are 7 and 13.

91% as a fraction is 91/100 or 0.91 as a decimal.

In the binary number system 91 can be written as 1011011.

In Roman Numerals the number 91 can be written as XCI.

If you travelled a distance of 91 miles then this would be equivalent to about 146 kilometers.

Also a length of 91 feet is equivalent to 28 meters.

A weight of 91 pounds is equivalent to 41.3 kilograms.

A temperature of 91 degree Celsius is about 196 degree Fahrenheit.

91 is the atomic number of protactinium, an actinide.

 See Also : Interesting Numbers Part 4

 

Interesting Number # 42 is 46

This interesting number is 46.

46 is the number of human chromosomes.

46 is the 16^th semiprime.

In geometry, the name of a 46 sided polygon is called a tetracontakaihexagon.

The number 46 is an even number - the 23rd even number to be precise.

The factors of 46 are 1, 2, 23 and 46 – so 46 is divisible by 4 numbers.

The only prime factors of 46 are 2 and 23

46% as a fraction is 23/50 or 0.46 as a decimal.

In the binary number system 46 can be written as 101110.

In Roman Numerals the number 46 can be written as XLVI.

If you travelled a distance of 46 miles then this would be equivalent to 74 kilometers.

Also a length of 46 feet is equivalent to 14.0 meters.

A weight of 46 pounds is equivalent to 20.9 kilograms.

A temperature of 46 degree Celsius is about 115 degree Fahrenheit.

  

Interesting Number # 43 is 89

This interesting number is 89.

89 is the 24th Prime Number.

89 is a Fibonacci number and therefore a Fibonacci Prime.

89 is the 10th Mersenne Prime.

89 is part of the Pythagorean Triple (39, 80, 89) because 39² + 80² = 89².

89 is an atomic number of the element actinium.

 

 

Interesting Number # 44 is 49

This interesting number is 49.

49 is a square number. 49 = 7²

49 is the first square where the digits are squares (4 and 9).

Arsenal Football Club, in the English Premier League, had an unbeaten run of 49 games between May 2003 through to October 2004 when they lost to Manchester United. This remains a national record in English football.

49 is the atomic number of the element indium.

The sum of the digits of the square of 49 (2401) is the square root of 49.

49 is trimorphic, that is, its cube ends in the same digits i.e. 49³ = 117649

 

 

Interesting Number # 45 is 35

This interesting number is 35.

35 is the sum of the first 5 triangle numbers. i.e. 1 + 3 + 6 + 10 + 15 = 35.

35 is a tetrahedral number.

35 is the number of ways 3 objects can be selected from 7 objects (a combination)

35 is a semi-prime (a product of two prime numbers 5 x 7)

There are 35 hexominoes (polyominoes made from 6 squares)

(Resource)