Base | Representation |
---|---|
bin | 10011100100101101011 |
3 | 1012120211002 |
4 | 2130211223 |
5 | 131011022 |
6 | 21425215 |
7 | 5310635 |
oct | 2344553 |
9 | 1176732 |
10 | 641387 |
11 | 3a897a |
12 | 26b20b |
13 | 195c26 |
14 | 129a55 |
15 | ca092 |
hex | 9c96b |
641387 has 2 divisors, whose sum is σ = 641388. Its totient is φ = 641386.
The previous prime is 641371. The next prime is 641411. The reversal of 641387 is 783146.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 641387 - 24 = 641371 is a prime.
It is a super-2 number, since 2×6413872 = 822754567538, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (641317) 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, 320693 + 320694.
It is an arithmetic number, because the mean of its divisors is an integer number (320694).
2641387 is an apocalyptic number.
641387 is a deficient number, since it is larger than the sum of its proper divisors (1).
641387 is an equidigital number, since it uses as much as digits as its factorization.
641387 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 4032, while the sum is 29.
The square root of 641387 is about 800.8664058381. The cubic root of 641387 is about 86.2395968689.
The spelling of 641387 in words is "six hundred forty-one thousand, three hundred eighty-seven".
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