The song reigns in just its seventh week and is the band's first leader since "Radioactive" in 2013.

Imagine Dragons return to the top of Billboard's Alternative Songs airplay chart for the first time in four years with "Believer," which jumps 3-1 on the chart dated April 1.

It's the band's second Alternative Songs No. 1, following "Radioactive," which ruled for 13 weeks beginning March 2, 2013. Since then, the Las Vegas-based rockers had reached the chart five times, with three top 10s to its credit, including the No. 2-peaking "Demons" (Aug. 20, 2013) and the No. 3 "I Bet My Life" (Feb. 7, 2015).

Meanwhile, having needed only seven weeks to reach No. 1 after its debut at No. 30 (Feb. 18), "Believer" marks the quickest rise to No. 1 on the tally in nearly two years, since Muse's "Dead Inside," which also sprinted to the top in its seventh week (May 23, 2015).

"Believer" tops Alternative Songs a week after its coronation on Hot Rock Songs, where it also became the band's first leader in four years, following, again, "Radioactive" (23 weeks at No. 1). The track holds atop Hot Rock Songs, as well as Rock Digital Song Sales and Alternative Digital Song Sales (39,000 sold in the week, according to Nielsen Music). It climbs 3-2 (a new peak) on Rock Airplay with 8.4 million overall audience impressions (up 5 percent) and keeps at its No. 2 high on Rock Streaming Songs (8.4 million streams, up 3 percent).

The track is the lead single from Imagine Dragons' third studio album, expected this year.