Base | Representation |
---|---|
bin | 111011000000001… |
… | …010100010000111 |
3 | 2112222200001222202 |
4 | 323000022202013 |
5 | 4011403231022 |
6 | 242120545115 |
7 | 33350000405 |
oct | 7300124207 |
9 | 2488601882 |
10 | 989898887 |
11 | 46885475a |
12 | 23762219b |
13 | 12a1115b3 |
14 | 9567c475 |
15 | 5bd88592 |
hex | 3b00a887 |
989898887 has 2 divisors, whose sum is σ = 989898888. Its totient is φ = 989898886.
The previous prime is 989898859. The next prime is 989898929. The reversal of 989898887 is 788898989.
It is a weak prime.
It is an emirp because it is prime and its reverse (788898989) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 989898887 - 214 = 989882503 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (989898857) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494949443 + 494949444.
It is an arithmetic number, because the mean of its divisors is an integer number (494949444).
Almost surely, 2989898887 is an apocalyptic number.
989898887 is a deficient number, since it is larger than the sum of its proper divisors (1).
989898887 is an equidigital number, since it uses as much as digits as its factorization.
989898887 is an evil number, because the sum of its binary digits is even.
The product of its digits is 167215104, while the sum is 74.
The square root of 989898887 is about 31462.6586130289. The cubic root of 989898887 is about 996.6215613392.
The spelling of 989898887 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, eight hundred eighty-seven".
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