Base | Representation |
---|---|
bin | 1000001100011… |
… | …11101010100101 |
3 | 11210100122122012 |
4 | 10012033222211 |
5 | 120044332033 |
6 | 10453244005 |
7 | 1463221226 |
oct | 406175245 |
9 | 153318565 |
10 | 68745893 |
11 | 35894897 |
12 | 1b033605 |
13 | 1131ca58 |
14 | 91b724d |
15 | 607e248 |
hex | 418faa5 |
68745893 has 2 divisors, whose sum is σ = 68745894. Its totient is φ = 68745892.
The previous prime is 68745877. The next prime is 68745899. The reversal of 68745893 is 39854786.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 62758084 + 5987809 = 7922^2 + 2447^2 .
It is a cyclic number.
It is not a de Polignac number, because 68745893 - 24 = 68745877 is a prime.
It is a Sophie Germain prime.
It is a Curzon number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (68745899) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34372946 + 34372947.
It is an arithmetic number, because the mean of its divisors is an integer number (34372947).
Almost surely, 268745893 is an apocalyptic number.
It is an amenable number.
68745893 is a deficient number, since it is larger than the sum of its proper divisors (1).
68745893 is an equidigital number, since it uses as much as digits as its factorization.
68745893 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1451520, while the sum is 50.
The square root of 68745893 is about 8291.3143107712. The cubic root of 68745893 is about 409.6524776774.
The spelling of 68745893 in words is "sixty-eight million, seven hundred forty-five thousand, eight hundred ninety-three".
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