| 11111111 | ||
|---|---|---|
| < 11111110 | ||
| 11111112 > | ||
11111111 is a 8-digit-long number.
Properties
- Its factors are 1, 11, 73, 101, 137, 803, 1111, 1507, 7373, 10001, 13837, 81103, 110011, 152207, 1010101 and 11111111, making it a composite number.[1][2][3] It is also a squarefree number.[4]
- 11111111 is an odd number[5][6] .
- 11111111 is an unhappy number.[7][8]
- 11111111 is deficient.[9]
- Its prime factorization is 111 × 731 × 1011 × 1371.
- 11111111 is a repdigit number, meaning it consists of one digit.[10]
- The sum of 11111111's digits is 8.
Approximations
| Notation | Lower bound | Upper bound | |
|---|---|---|---|
| Up-arrow notation | 3333 ↑ 2 | ||
| Scientific notation | 1.111 x 107 | ||
| Slow-growing hierarchy | \(g_{\omega^{\omega}}(7)\) | \(g_{\omega^{\omega}}(8)\) | |
| Chained arrow notation | 3333 → 2 | ||
| Bowers' Exploding Array Function/Bird's array notation | {3333,2} | ||
| Hardy hierarchy | Hω(5555555) | Hω(5555556) | |
| Middle-growing hierarchy | m(ω,23) | ||
| Hyper-E notation | E7.0458 | ||
| Hyper-E notation (non-10 base) | \(E[3333]2\) | ||
| X-Sequence Hyper-Exponential Notation | 3333{1}2 | ||
| PlantStar's Debut Notation | [4] | [5] | |
| H* function | H(1.3) | H(1.4) | |
| Bashicu matrix system with respect to version 4 | (0)[3333] | (0)[3334] | |
Sources
- ↑ OEIS A002808 - Composite numbers
- ↑ Wolfram Alpha Is 11111111 composite?
- ↑ Wolfram Alpha 11111111's factors
- ↑ OEIS A005117 - Squarefree numbers
- ↑ OEIS A005408 - Odd numbers
- ↑ Wolfram Alpha Is 11111111 odd?
- ↑ Wolfram Alpha Unhappy Numbers
- ↑ OEIS A031177 - Unhappy Numbers
- ↑ OEIS A005100 - Deficient numbers
- ↑ OEIS A010785 - Repdigit numbers