196

196 = 2² x 7².

196 is the smallest square that contains a multidigit prime number as a substring.

196 = 14² is a perfect square.

196 is the difference of two square numbers: 196 = 50² - 48².

The consecutive squares 13² = 169 and 14² = 196 use the same digits; 31² = 961 also uses the same digits.

196 has a unique representation as a sum of three squares: 196 = 4² + 6² + 12².

196 is a pentagonal pyramidal number and a heptagonal pyramidal number.

It is conjectured that 196 is the lowest Lychrel number. It is the lowest number not known to produce a palindrome by repeated reversal and addition. The algorithm has been tested to more than 246 million digits without finding a palindrome, but no one has ever proved that it will never produce one.

The Mercedes-Benz W196 was an entry in the 1954 and 1955 Formula One car racing series, winning 9 of 12 races.

Source: Number Gossip

482

482 = 2 x 241.

482 has a representation as a sum of two squares: 482 = 11² + 19².

482 is 222 in base 15. It is 585 in base 9.

482 is a number whose square (232,324) and cube (111,980,168) use different digits.

482 Music is an independent record label featuring international jazz.

Source: What's Special About This Number?

981

981 = 3² x 109.

981 has a representation as a sum of two squares: 981 = 9² + 30².

327 + 654 = 981 uses each of the digits 1-9 once.

981 and 981² = 962,361 have the same initial digit and final digit.

Turkish Airlines Flight 981 was a McDonnell Douglas DC-10 that crashed in France in 1974, killing all 346 people on board.

Source: Numeropedia

186

186 = 2 x 3 x 31.

186 is the maximum number of regions into which 9 spheres divide space.

7 x 5 x 3 x 2 - 4 x 3 x 2 x 1 = 186.

186 x 39 = 7254 uses each of the nine digits 1-9 once.

186 is 1221 in base 5 and 272 in base 8.

186 is the number of odd days in a year that is not a leap year.

Source: Number Gossip

594

594 = 2 x 3³ x 11.

594 is 1001010010 in base 2 (binary). It is 4334 in base 5 and 1122 in base 8.

594 is the smallest number that has 10 representations as a sum of three positive squares: 594 = 1² + 8² + 23² = 3² + 3² + 24² = 3² + 12² + 21² = 4² + 7² + 23² = 4² + 17² + 17² = 5² + 13² + 20² = 7² + 16² + 17² = 8² + 13² + 19² = 12² + 15² + 15² = 13² + 13² + 16².

594 = 1⁵ + 2⁹ + 3⁴.

594 is the sum of 10 consecutive primes: 594 = 41 + 43 + 47 + 53 + 59 + 61 + 67 + 71 + 73 + 79.

USS Permit (SSN-594) was a nuclear submarine that was launched in 1961 and decommissioned in 1991.

Source: What's Special About This Number?

976

976 = 2⁴ x 61.

976 is a decagonal number. It is also a centered triangular number.

976 has a square formed by inserting a block of digits inside the original number: 976² = 952,576.

976 has a representation as a sum of two squares: 976 = 20² + 24².

976 is a divisor of 11⁴ - 1.

976-EVIL is a 1989 horror film directed by Robert Englund.

Source: What's Special About This Number?

680

680 = 2³ x 5 x 17.

680 is the 15th tetrahedral number. It is the smallest tetrahedral number that is also the sum of two tetrahedral numbers: 680 = 560 + 120.

680 has two representations as a sum of two squares: 680 = 2² + 26² = 14² + 22².

680 is 404 in base 13.

680 can be written as the sum of distinct odd powers of two: 680 = 2³ + 2⁵ + 2⁷ + 2⁹.

WCBM AM 680 is a talk radio station in Baltimore.

Source: Number Gossip