Base | Representation |
---|---|
bin | 1111111001110… |
… | …10101001101101 |
3 | 100022000220021111 |
4 | 13330322221231 |
5 | 233123100024 |
6 | 21123232021 |
7 | 3206650441 |
oct | 774725155 |
9 | 308026244 |
10 | 133409389 |
11 | 693404a3 |
12 | 38818611 |
13 | 21840589 |
14 | 13a0a821 |
15 | baa3a94 |
hex | 7f3aa6d |
133409389 has 2 divisors, whose sum is σ = 133409390. Its totient is φ = 133409388.
The previous prime is 133409371. The next prime is 133409417. The reversal of 133409389 is 983904331.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 133402500 + 6889 = 11550^2 + 83^2 .
It is an emirp because it is prime and its reverse (983904331) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-133409389 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (133409329) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66704694 + 66704695.
It is an arithmetic number, because the mean of its divisors is an integer number (66704695).
Almost surely, 2133409389 is an apocalyptic number.
It is an amenable number.
133409389 is a deficient number, since it is larger than the sum of its proper divisors (1).
133409389 is an equidigital number, since it uses as much as digits as its factorization.
133409389 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 69984, while the sum is 40.
The square root of 133409389 is about 11550.2982212582. The cubic root of 133409389 is about 510.9700734233.
The spelling of 133409389 in words is "one hundred thirty-three million, four hundred nine thousand, three hundred eighty-nine".
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