• Source: 80,000

80,000 (eighty thousand) is the natural number after 79,999 and before 80,001.




Selected numbers in the range 80,000–89,999


80,782 = Pell number P14
81,081 = smallest abundant number ending in 1, 3, 7, or 9
81,181 = number of reduced trees with 25 nodes
82,000 = the only currently known number greater than 1 that can be written in bases from 2 through 5 using only 0s and 1s.
82,025 = number of primes



≤

2

20




{\displaystyle \leq 2^{20}}

.
82,467 = number of square (0,1)-matrices without zero rows and with exactly 6 entries equal to 1
82,656 = Kaprekar number: 826562 = 6832014336; 68320 + 14336 = 82656
82,944 = 3-smooth number: 210 × 34
83,097 = Riordan number
83,160 = highly composite number
83,357 = Friedman prime
83,521 = 174
84,187 – number of parallelogram polyominoes with 15 cells.
84,375 = 33×55
84,672 = number of primitive polynomials of degree 21 over GF(2)
85,085 = product of five consecutive primes: 5 × 7 × 11 × 13 × 17
85,184 = 443
86,400 = seconds in a day: 24 × 60 × 60 and common DNS default time to live
87,360 = unitary perfect number
88,789 = the start of a prime 9-tuple, along with 88793, 88799, 88801, 88807, 88811, 88813, 88817, and 88819.
88,888 = repdigit
89,134 = number of partitions of 45




= Primes

=
There are 876 prime numbers between 80000 and 90000.




See also


80,000 Hours, a British social impact career advisory organization




References

Kata Kunci Pencarian:

• Žiežmariai
• Daftar planet minor: 79001–80000
• Teluk Balikpapan
• Amonium karbonat
• Tahun
• Daftar planet minor/79901–80000
• Bita
• Danau Petén Itzá
• Sistem Besaran Internasional
• Tahun cahaya
• ISO/IEC 80000
• 80,000
• ISO 31
• Meanings of minor-planet names: 79001–80000
• List of minor planets: 79001–80000
• Kintetsu 80000 series
• 80000 series
• Tobu 80000 series
• ISO 31-11
• Shin-Keisei 80000 series