106

106 = 2 x 53.

106 has a representation as a sum of two squares: 106 = 5² + 9².

106 is a divisor of 23⁴ - 1.

106 = 25 + 26 + 27 + 28.

15 straight cuts through a pizza can produce as many as 106 pieces.

106 is a centered pentagonal number and a centered heptagonal number.

The sum of the first 106 digits of pi is a prime.

Messier 106 is a bright spiral galaxy in the constellation Canes Venatici.

Source: Prime Curios!

148

148 = 2² x 37.

148 has a representation as a sum of two squares: 148 = 2² + 12².

148 is a heptagonal number. It is also a centered heptagonal number.

148 is the number of perfect graphs with six vertices.

148 x (14 + 8) = 14³ + 8³ = 3256.

Three square numbers using the same digits: 148² = 21904; 203² = 41209; and 302² = 91204.

The astronomical object Arp 148 is the spectacular aftermath of an encounter between two galaxies.

Source: Numeropedia

316

316 = 2² x 79.

316 is a number that cannot be written as a sum of three squares.

316 is a centered triangular number. It is also a centered heptagonal number.

316 has a digit product that is the digit sum of (3¹)⁶ = 729: 3 x 1 x 6 = 18; and 7 + 2 + 9 = 18.

316 is the telephone area code for the city of Wichita, Kansas.

Source: What's Special About This Number?

638

638 = 2 x 11 x 29.

638 is the sum of four consecutive primes: 151 + 157 + 163 + 167 = 638.

638 is the solution to the postage stamp problem for 7 denominations and 6 stamps.


638 is a centered heptagonal number.


The Islamic calendar was introduced in the year 638.

Source: Wikipedia