Base | Representation |
---|---|
bin | 110000100011… |
… | …100110000111 |
3 | 212221200111202 |
4 | 300203212013 |
5 | 11224304321 |
6 | 1132453115 |
7 | 213122642 |
oct | 60434607 |
9 | 25850452 |
10 | 12728711 |
11 | 72042a6 |
12 | 431a19b |
13 | 28388a8 |
14 | 1994a59 |
15 | 11b670b |
hex | c23987 |
12728711 has 2 divisors, whose sum is σ = 12728712. Its totient is φ = 12728710.
The previous prime is 12728707. The next prime is 12728713. The reversal of 12728711 is 11782721.
It is a strong prime.
It is an emirp because it is prime and its reverse (11782721) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 12728711 - 22 = 12728707 is a prime.
It is a Sophie Germain prime.
Together with 12728713, it forms a pair of twin primes.
It is a Chen prime.
It is equal to p832709 and since 12728711 and 832709 have the same sum of digits, it is a Honaker prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12728713) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6364355 + 6364356.
It is an arithmetic number, because the mean of its divisors is an integer number (6364356).
Almost surely, 212728711 is an apocalyptic number.
12728711 is a deficient number, since it is larger than the sum of its proper divisors (1).
12728711 is an equidigital number, since it uses as much as digits as its factorization.
12728711 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1568, while the sum is 29.
The square root of 12728711 is about 3567.7319125741. The cubic root of 12728711 is about 233.4863388755.
The spelling of 12728711 in words is "twelve million, seven hundred twenty-eight thousand, seven hundred eleven".
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