1919

1919 < 1918 | 1920 >
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1919 is the number following 1918 and preceding 1920.

Properties

• Its factors are 1, 19, 101 and 1919, making it a composite number. It is also a squarefree number.
• 1919 is an odd number.
• 1919 is an unhappy number.
  

• 1919 is deficient.
  
• Its prime factorization is 19¹ × 101¹.
  

Approximations

Notation	Lower bound	Upper bound
Up-arrow notation	44 ↑ 2
Scientific notation	\(1.919\times10^3\)	\(1.92\times10^3\)
Slow-growing hierarchy	\(g_{\omega^{\omega}}(4)\)	\(g_{\omega^{\omega}}(5)\)
Copy notation	19[2]	19[2]
Chained arrow notation	44 → 2
Bowers' Exploding Array Function/Bird's array notation	{44,2}
Fast-growing hierarchy	f2(7)	f2(8)
Hardy hierarchy	Hω(959)	Hω(960)
Middle-growing hierarchy	m(ω,10)	m(ω,11)
Hyper-E notation	E3.2831
Hyper-E notation (non-10 base)	\(E[44]2\)
Hyperfactorial array notation	6!	7!
X-Sequence Hyper-Exponential Notation	44{1}2
Steinhaus-Moser Notation	4[3]	5[3]
PlantStar's Debut Notation	[1]	[2]
H* function	H(0)	H(0.1)
Bashicu matrix system with respect to version 4	(0)[43]	(0)[44]
m(n) map	m(1)(4)	m(1)(5)
s(n) map	\(s(1)(\lambda x . x+1)(958)\)	\(s(1)(\lambda x . x+1)(959)\)