208535489 has 2 divisors, whose sum is σ = 208535490. Its totient is φ = 208535488.

The previous prime is 208535479. The next prime is 208535497. The reversal of 208535489 is 984535802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180445489 + 28090000 = 13433^2 + 5300^2 .

It is a cyclic number.

It is not a de Polignac number, because 208535489 - 2⁴ = 208535473 is a prime.

It is not a weakly prime, because it can be changed into another prime (208535479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104267744 + 104267745.

It is an arithmetic number, because the mean of its divisors is an integer number (104267745).

Almost surely, 2^208535489 is an apocalyptic number.

It is an amenable number.

208535489 is a deficient number, since it is larger than the sum of its proper divisors (1).

208535489 is an equidigital number, since it uses as much as digits as its factorization.

208535489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 208535489 is about 14440.7579094728. The cubic root of 208535489 is about 593.0072343984.

The spelling of 208535489 in words is "two hundred eight million, five hundred thirty-five thousand, four hundred eighty-nine".