Base | Representation |
---|---|
bin | 11111001101010110010011 |
3 | 120101122102011 |
4 | 133031112103 |
5 | 4043244024 |
6 | 451203351 |
7 | 126352501 |
oct | 37152623 |
9 | 16348364 |
10 | 8181139 |
11 | 468867a |
12 | 28a6557 |
13 | 1905a15 |
14 | 112d671 |
15 | ab9094 |
hex | 7cd593 |
8181139 has 2 divisors, whose sum is σ = 8181140. Its totient is φ = 8181138.
The previous prime is 8181127. The next prime is 8181167. The reversal of 8181139 is 9311818.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 8181139 - 27 = 8181011 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 8181139.
It is not a weakly prime, because it can be changed into another prime (8181119) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4090569 + 4090570.
It is an arithmetic number, because the mean of its divisors is an integer number (4090570).
Almost surely, 28181139 is an apocalyptic number.
8181139 is a deficient number, since it is larger than the sum of its proper divisors (1).
8181139 is an equidigital number, since it uses as much as digits as its factorization.
8181139 is an evil number, because the sum of its binary digits is even.
The product of its digits is 1728, while the sum is 31.
The square root of 8181139 is about 2860.2690432895. The cubic root of 8181139 is about 201.4982400247.
The spelling of 8181139 in words is "eight million, one hundred eighty-one thousand, one hundred thirty-nine".
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