Observers are saying Emmanuel Macron's election as president of France is a victory for Europe. "I look forward to working closely with President-elect @EmmanuelMacron to further strengthen India-France ties".
Le Pen nevertheless won the support of 10.6 million people.
The two men separated when Macron quit in August 2016 to prepare his presidential bid.
In 2014, Macron became minister of economy, industry and digital data under President Francois Hollande. Le Pen favored ditching the euro and creating stricter business-protectionist measures and a large reduction in immigration.
French deputy to the European Parliament Sylvie Goulard said Macron would make Berlin his first official visit, with perhaps a stop to see French troops stationed overseas as well.
Macron's optimistically named "En Marche!" But it will be contesting its first ever election. That means many of them may be burdened by the handicap of being largely unknown to voters in constituencies they compete for.
The opponents of Macron likely to follow the policies of Donald Trump like Le Pen would like to take France out of worldwide institutions, including both the European Union and North Atlantic Treaty Organisation; block borders; curtail trade; and impose quasi-Marxist state-dominated economics.
The euro fell the most against the dollar since late March, having risen in overnight trade to just above $1.10 when opinion polls signaled the scale of Macron's victory over anti-euro nationalist Marine Le Pen.
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Much will also depend on both the candidates' score on Sunday. His rivals now will be motivated to keep Macron from making further gains during the two-round parliamentary election. If he does, he would be able to pick the candidate of his choice to lead the government as prime minister.
While Macron did promise to combat worldwide terrorism and climate change in his first public remarks as president-elect, his first big challenge lies at home. But that is far from guaranteed. "Marine Le Pen... is not departing the political scene". Macron can't count on their loyalty. "Macron: Not even started, already hated", it read.
Mr Philippot said: "It's going to change into a new political force which, necessarily, will not have the same name".
En Marche's 577 candidates will be announced by Thursday.
But he now needs to consolidate a win where a chunk of those who backed him in the playoff against Le Pen came from political parties that voted to stop her rather than to put him in the driving seat for the next five years.
"This majority for change is what the country wants and what it deserves", he told thousands of flag-waving supporters at a victory party in the courtyard of the Louvre Museum on Sunday.
More congratulations rolled in from world leaders.
World leaders on Monday largely hailed the thumping victory of Emmanuel Macron in France's presidential election, with the European Union nations breathing a sigh of relief and describing it a triumph for a strong and united Europe.
Although the centrist politician faces a huge task ahead to unite a fractured and anxious country, his win has been greeted with relief by European Union leaders and financial markets.