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249 is the number following 248 and preceding 250[1].

Properties[]

  • 249 is deficient.[10]
  • Its prime factorization is 31 × 831.


Approximations[]

Notation Lower bound Upper bound
Up-arrow notation 3 ↑ 5
Scientific notation 2.49 x 102 2.491 x 102
Slow-growing hierarchy \(g_{\omega^{\omega}}(3)\) \(g_{\omega^{\omega}}(4)\)
Copy notation 2[3] 3[3]
Chained arrow notation 3 → 5
Bowers' Exploding Array Function/Bird's array notation {3,5}
Fast-growing hierarchy f2(5) f2(6)
Hardy hierarchy Hω(124) Hω(125)
Middle-growing hierarchy m(ω,7) m(ω,8)
Hyper-E notation E2.3962
Hyper-E notation (non-10 base) \(E[3]5\)
Hyperfactorial array notation 5! 6!
X-Sequence Hyper-Exponential Notation 3{1}5
Steinhaus-Moser Notation 3[3] 4[3]
PlantStar's Debut Notation [1] [2]
H* function H(-0.3) H(-0.2)
Bashicu matrix system with respect to version 4 (0)[15] (0)[16]
m(n) map m(1)(3) m(1)(4)
s(n) map \(s(1)(\lambda x . x+1)(123)\) \(s(1)(\lambda x . x+1)(124)\)

Sources[]