Base | Representation |
---|---|
bin | 1111011011111… |
… | …01110001100011 |
3 | 100000122202220122 |
4 | 13231331301203 |
5 | 231122140034 |
6 | 20503230455 |
7 | 3131434631 |
oct | 755756143 |
9 | 300582818 |
10 | 129490019 |
11 | 6710384a |
12 | 3744842b |
13 | 20a9a619 |
14 | 132aa351 |
15 | b57c62e |
hex | 7b7dc63 |
129490019 has 2 divisors, whose sum is σ = 129490020. Its totient is φ = 129490018.
The previous prime is 129489991. The next prime is 129490051. The reversal of 129490019 is 910094921.
It is a weak prime.
It is an emirp because it is prime and its reverse (910094921) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-129490019 is a prime.
It is a super-2 number, since 2×1294900192 = 33535330041240722, which contains 22 as substring.
It is a Sophie Germain prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (129490219) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64745009 + 64745010.
It is an arithmetic number, because the mean of its divisors is an integer number (64745010).
Almost surely, 2129490019 is an apocalyptic number.
129490019 is a deficient number, since it is larger than the sum of its proper divisors (1).
129490019 is an equidigital number, since it uses as much as digits as its factorization.
129490019 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 5832, while the sum is 35.
The square root of 129490019 is about 11379.3681283277. The cubic root of 129490019 is about 505.9164081007.
The spelling of 129490019 in words is "one hundred twenty-nine million, four hundred ninety thousand, nineteen".
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