208480621 has 2 divisors, whose sum is σ = 208480622. Its totient is φ = 208480620.

The previous prime is 208480609. The next prime is 208480663. The reversal of 208480621 is 126084802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139358025 + 69122596 = 11805^2 + 8314^2 .

It is a cyclic number.

It is not a de Polignac number, because 208480621 - 2¹⁷ = 208349549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208480691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104240310 + 104240311.

It is an arithmetic number, because the mean of its divisors is an integer number (104240311).

Almost surely, 2^208480621 is an apocalyptic number.

It is an amenable number.

208480621 is a deficient number, since it is larger than the sum of its proper divisors (1).

208480621 is an equidigital number, since it uses as much as digits as its factorization.

208480621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 208480621 is about 14438.8580227108. The cubic root of 208480621 is about 592.9552209096.

The spelling of 208480621 in words is "two hundred eight million, four hundred eighty thousand, six hundred twenty-one".