Base | Representation |
---|---|
bin | 10111110110111001… |
… | …11000100010011011 |
3 | 1020001122121122202122 |
4 | 23323130320202123 |
5 | 202212444244134 |
6 | 5514552251455 |
7 | 632260124315 |
oct | 137334704233 |
9 | 36048548678 |
10 | 12808587419 |
11 | 5483128341 |
12 | 25956a0b8b |
13 | 1291833314 |
14 | 8971807b5 |
15 | 4ee74202e |
hex | 2fb73889b |
12808587419 has 2 divisors, whose sum is σ = 12808587420. Its totient is φ = 12808587418.
The previous prime is 12808587391. The next prime is 12808587497. The reversal of 12808587419 is 91478580821.
It is a weak prime.
It is an emirp because it is prime and its reverse (91478580821) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-12808587419 is a prime.
It is a super-2 number, since 2×128085874192 (a number of 21 digits) contains 22 as substring.
It is a Sophie Germain prime.
It is not a weakly prime, because it can be changed into another prime (12808587019) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6404293709 + 6404293710.
It is an arithmetic number, because the mean of its divisors is an integer number (6404293710).
Almost surely, 212808587419 is an apocalyptic number.
12808587419 is a deficient number, since it is larger than the sum of its proper divisors (1).
12808587419 is an equidigital number, since it uses as much as digits as its factorization.
12808587419 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1290240, while the sum is 53.
The spelling of 12808587419 in words is "twelve billion, eight hundred eight million, five hundred eighty-seven thousand, four hundred nineteen".
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