I have fetch product details using function in product view page like below.

Here Sm/Sawyer is my theme.

$_config = $this->helper('Sm\Sawyer\Helper\Data');
$productId = $this->getProduct()->getId();
$name = $this->getProduct()->getName();
$stock1 = $this->getProduct()->getQty();
$price = $this->getProduct()->getPrice(