How to Get Product Custom AttributeValue By Id Magento 2

How to  Get Product Custom AttributeValue By Id Magento 2
$productId = 654;

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();

   $product = $objectManager->create('Magento\Catalog\Model\Product')->load($productId);

   $myCustomAttrVal = $product->getData('my_custom_attribute');

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