Base | Representation |
---|---|
bin | 1111011010011… |
… | …0101110110101 |
3 | 11111122100201212 |
4 | 3312212232311 |
5 | 113022133234 |
6 | 10225331205 |
7 | 1413324335 |
oct | 366465665 |
9 | 144570655 |
10 | 64646069 |
11 | 33544604 |
12 | 19796b05 |
13 | 10515917 |
14 | 882b0c5 |
15 | 5a1e5ce |
hex | 3da6bb5 |
64646069 has 2 divisors, whose sum is σ = 64646070. Its totient is φ = 64646068.
The previous prime is 64646033. The next prime is 64646093. The reversal of 64646069 is 96064646.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 42902500 + 21743569 = 6550^2 + 4663^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-64646069 is a prime.
It is a super-2 number, since 2×646460692 = 8358228474305522, which contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (64646269) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32323034 + 32323035.
It is an arithmetic number, because the mean of its divisors is an integer number (32323035).
Almost surely, 264646069 is an apocalyptic number.
It is an amenable number.
64646069 is a deficient number, since it is larger than the sum of its proper divisors (1).
64646069 is an equidigital number, since it uses as much as digits as its factorization.
64646069 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 186624, while the sum is 41.
The square root of 64646069 is about 8040.2779180822. The cubic root of 64646069 is about 401.3414731783.
The spelling of 64646069 in words is "sixty-four million, six hundred forty-six thousand, sixty-nine".
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