Base | Representation |
---|---|
bin | 1111100111010… |
… | …11001111000101 |
3 | 100010110211022111 |
4 | 13303223033011 |
5 | 232013040244 |
6 | 20555301021 |
7 | 3150241102 |
oct | 763531705 |
9 | 303424274 |
10 | 130986949 |
11 | 67a36485 |
12 | 37a4a771 |
13 | 211a2a92 |
14 | 13579aa9 |
15 | b775e34 |
hex | 7ceb3c5 |
130986949 has 2 divisors, whose sum is σ = 130986950. Its totient is φ = 130986948.
The previous prime is 130986937. The next prime is 130986959. The reversal of 130986949 is 949689031.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 130370724 + 616225 = 11418^2 + 785^2 .
It is an emirp because it is prime and its reverse (949689031) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 130986949 - 25 = 130986917 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (130986959) 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, 65493474 + 65493475.
It is an arithmetic number, because the mean of its divisors is an integer number (65493475).
Almost surely, 2130986949 is an apocalyptic number.
It is an amenable number.
130986949 is a deficient number, since it is larger than the sum of its proper divisors (1).
130986949 is an equidigital number, since it uses as much as digits as its factorization.
130986949 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 419904, while the sum is 49.
The square root of 130986949 is about 11444.9529924766. The cubic root of 130986949 is about 507.8584413991.
The spelling of 130986949 in words is "one hundred thirty million, nine hundred eighty-six thousand, nine hundred forty-nine".
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