79 80 81 82 83 84 85 86 87 88 89 90
| |||
Glavni števnik | devetinosemdeset | ||
Vrstilni števnik | devetinosemdeseti | ||
Razcep | 24. praštevilo | ||
Rimska številka | LXXXIX | ||
Dvojiško | 1011001 | ||
Šestnajstiško | 59 | ||
Matematične lastnosti | |||
---|---|---|---|
φ(89) = 88 | |||
τ(89) = 2 {1, 89} | |||
σ(89) = 90 | |||
π(89) = 24 | |||
μ(89) = -1 | |||
M(89) = -2 |
89 (devétinósemdeset) je naravno število, za katero velja 89 = 88 + 1 = 90 - 1.
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