Number 1999

1999 is prime.

1999 prime factorization is 1999¹

1999 prime factorization is 1999

Divisors (2): 1, 1999

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Properties#

1999 is 10th centered triangular prime for n = 36
1999 is part of 65th cousin prime {1999, 2003}
1999 is 303rd prime
1999 is part of 50th prime triplet {1997, 1999, 2003}
1999 is part of 49th prime triplet {1993, 1997, 1999}
1999 is part of 128th sexy prime {1993, 1999}
1999 is part of 50th sexy prime triplet {1987, 1993, 1999}
1999 is part of 61st twin prime {1997, 1999}

External#

Neighbours#

1987₆	1988	1989	1990	1991₁
1992	1993₁₀	1994₁	1995	1996
1997₁₀	1998	1999₈	2000	2001
2002	2003₉	2004	2005₁	2006
2007	2008	2009	2010	2011₄

Compare with#

1987₆	1988	1989	1990	1991₁
1992	1993₁₀	1994₁	1995	1996
1997₁₀	1998	1999₈	2000	2001
2002	2003₉	2004	2005₁	2006
2007	2008	2009	2010	2011₄

Different Representations#

1999 in roman numerals is MCMXCIX
1999 in base 2 is 11111001111₂
1999 in base 3 is 2202001₃
1999 in base 4 is 133033₄
1999 in base 5 is 30444₅
1999 in base 6 is 13131₆
1999 in base 7 is 5554₇
1999 in base 8 is 3717₈
1999 in base 9 is 2661₉
1999 in base 10 is 1999₁₀
1999 in base 11 is 1558₁₁
1999 in base 12 is 11a7₁₂
1999 in base 13 is baa₁₃
1999 in base 14 is a2b₁₄
1999 in base 15 is 8d4₁₅
1999 in base 16 is 7cf₁₆

Belongs Into#

1999 belongs into first 50 centered triangular primes.
1999 belongs into first 100 cousin primes.
1999 belongs into first 500 primes.
1999 belongs into first 100 prime triplets.
1999 belongs into first 50 prime triplets.
1999 belongs into first 500 sexy primes.
1999 belongs into first 100 sexy prime triplets.
1999 belongs into first 100 twin primes.

As Timestamp#

0 + 1 * 1999: Convert timestamp 1999 to date is 1970-01-01 00:33:19
0 + 1000 * 1999: Convert timestamp 1999000 to date is 1970-01-24 03:16:40
1300000000 + 1000 * 1999: Convert timestamp 1301999000 to date is 2011-04-05 10:23:20
1400000000 + 1000 * 1999: Convert timestamp 1401999000 to date is 2014-06-05 20:10:00
1500000000 + 1000 * 1999: Convert timestamp 1501999000 to date is 2017-08-06 05:56:40
1600000000 + 1000 * 1999: Convert timestamp 1601999000 to date is 2020-10-06 15:43:20
1700000000 + 1000 * 1999: Convert timestamp 1701999000 to date is 2023-12-08 01:30:00

You May Also Ask#

Smaller than 1999#

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