Base | Representation |
---|---|
bin | 110000011111… |
… | …011111101001 |
3 | 212220211110121 |
4 | 300133133221 |
5 | 11223240123 |
6 | 1132243241 |
7 | 213022654 |
oct | 60373751 |
9 | 25824417 |
10 | 12711913 |
11 | 71a2715 |
12 | 4310521 |
13 | 2831056 |
14 | 198c89b |
15 | 11b175d |
hex | c1f7e9 |
12711913 has 2 divisors, whose sum is σ = 12711914. Its totient is φ = 12711912.
The previous prime is 12711901. The next prime is 12711929. The reversal of 12711913 is 31911721.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 8743849 + 3968064 = 2957^2 + 1992^2 .
It is an emirp because it is prime and its reverse (31911721) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 12711913 - 29 = 12711401 is a prime.
It is not a weakly prime, because it can be changed into another prime (12711943) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6355956 + 6355957.
It is an arithmetic number, because the mean of its divisors is an integer number (6355957).
Almost surely, 212711913 is an apocalyptic number.
It is an amenable number.
12711913 is a deficient number, since it is larger than the sum of its proper divisors (1).
12711913 is an equidigital number, since it uses as much as digits as its factorization.
12711913 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 378, while the sum is 25.
The square root of 12711913 is about 3565.3769786658. The cubic root of 12711913 is about 233.3835835085.
The spelling of 12711913 in words is "twelve million, seven hundred eleven thousand, nine hundred thirteen".
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