Answer

Yes, in Jain tradition, Sanatkumār Chakravartī is associated with a very long period of spiritual practice and renunciation.

However, I should clarify carefully: the exact statement that “Sanatkumār did sādhanā for 700 years” depends on the specific traditional text or pravachan source being followed. I should not present that number as universal unless tied to a verified Jain source.

Explanation

Sanatkumār was a great Chakravartī in Jain tradition. He is remembered for:

• His extraordinary beauty and worldly glory,
• The impermanence of the body and worldly pleasures,
• His eventual detachment from worldly life,
• His movement toward spiritual discipline.

His life story is often used to teach that even the most beautiful, powerful, and wealthy person cannot escape aging, disease, and the temporary nature of the body.

Spiritual Understanding

The deeper Jain lesson is not merely the number of years, but the message of vairāgya — detachment.

Sanatkumār’s story reminds us:

• External beauty is temporary.
• Royal power and pleasure cannot give permanent happiness.
• True greatness lies in turning toward the soul.
• Sādhanā is meaningful when it leads to reduction of attachment, ego, and passions.

Takeaway

It is traditionally accepted that Sanatkumār performed very deep and long spiritual practice, but the specific figure of 700 years should be confirmed from the exact Jain text or tradition you are referring to.