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707 was the last of California's thirteen area codes with only 0 or 1 in middle position, the others being 310, 510, 818 and 909, all of which, in addition to 619, were introduced decades after 707's debut) to require relief from a "new format" area code (those with 2–8 as their middle digit, which were introduced beginning in 1995 when the ...
369 is the magic constant of the 9 × 9 magic square [1] [2] and the n-Queens Problem for n = 9. [2] There are 369 free octominoes (polyominoes of order 8). [3] [4] 369 is a Ruth-Aaron Pair with 370. The sums of their prime factors are equivalent. [5]
[1] The topic of standardized codes has been discussed in US law enforcement circles, but there is no consensus on the issue. Some law enforcement agencies use “plain talk” or “plain codes” which replace codes with standard speech and terminology, albeit in a structured manner or format.
Salakau (Chinese: 三六九; Pe̍h-ōe-jī: Saⁿ-la̍k-káu), which means 369 in Hokkien, also known as "Sah Lak Kau", is a street gang or secret society based in Singapore. The numbers 3, 6 and 9 add up to 18, which was the name of an older gang; the number signified the 18 arhats (principal disciples) of Shaolin Monastery .
Name First elements Short description OEIS Mersenne prime exponents : 2, 3, 5, 7, 13, 17, 19, 31, 61, 89, ... Primes p such that 2 p − 1 is prime.: A000043 ...
369.2 Low vision, both eyes; 369.3 Unqualified visual loss, both eyes; 369.4 Legal blindness, as defined in U.S.A. 369.6 Blindness, one eye; 369.7 Low vision, one eye; 369.8 Unqualified visual loss, one eye; 369.9 Unspecified visual loss; 370 Keratitis. 370.0 Corneal ulcer; 370.1* Dendritic keratitis (054.4 †) 370.2 Other superficial ...
Fixed line numbers in Botswana are seven digits long in a closed telephone numbering plan, with the geographical area being indicated by the first two or three digits, meaning that there are no area codes.
d() is the number of positive divisors of n, including 1 and n itself; σ() is the sum of the positive divisors of n, including 1 and n itselfs() is the sum of the proper divisors of n, including 1 but not n itself; that is, s(n) = σ(n) − n