Base | Representation |
---|---|
bin | 101011010100… |
… | …111100011101 |
3 | 210101001012222 |
4 | 223110330131 |
5 | 10401423411 |
6 | 1043235125 |
7 | 165353435 |
oct | 53247435 |
9 | 23331188 |
10 | 11357981 |
11 | 6458468 |
12 | 3978aa5 |
13 | 24789cb |
14 | 17192c5 |
15 | ee54db |
hex | ad4f1d |
11357981 has 2 divisors, whose sum is σ = 11357982. Its totient is φ = 11357980.
The previous prime is 11357959. The next prime is 11357993. The reversal of 11357981 is 18975311.
11357981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 6205081 + 5152900 = 2491^2 + 2270^2 .
It is an emirp because it is prime and its reverse (18975311) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 11357981 - 26 = 11357917 is a prime.
It is a super-2 number, since 2×113579812 = 258007464792722, which contains 22 as substring.
It is equal to p748565 and since 11357981 and 748565 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 (11357081) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5678990 + 5678991.
It is an arithmetic number, because the mean of its divisors is an integer number (5678991).
Almost surely, 211357981 is an apocalyptic number.
It is an amenable number.
11357981 is a deficient number, since it is larger than the sum of its proper divisors (1).
11357981 is an equidigital number, since it uses as much as digits as its factorization.
11357981 is an evil number, because the sum of its binary digits is even.
The product of its digits is 7560, while the sum is 35.
The square root of 11357981 is about 3370.1603819403. The cubic root of 11357981 is about 224.7848544251.
The spelling of 11357981 in words is "eleven million, three hundred fifty-seven thousand, nine hundred eighty-one".
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