208289641 has 6 divisors (see below), whose sum is σ = 242296170. Its totient is φ = 178533936.

The previous prime is 208289639. The next prime is 208289657. The reversal of 208289641 is 146982802.

It can be written as a sum of positive squares in only one way, i.e., 159289641 + 49000000 = 12621^2 + 7000^2 .

It is not a de Polignac number, because 208289641 - 2¹ = 208289639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208289594 and 208289603.

It is not an unprimeable number, because it can be changed into a prime (208289621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2125356 + ... + 2125453.

It is an arithmetic number, because the mean of its divisors is an integer number (40382695).

Almost surely, 2^208289641 is an apocalyptic number.

It is an amenable number.

208289641 is a deficient number, since it is larger than the sum of its proper divisors (34006529).

208289641 is an equidigital number, since it uses as much as digits as its factorization.

208289641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250823 (or 4250816 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 208289641 is about 14432.2431035512. The cubic root of 208289641 is about 592.7741054594.

The spelling of 208289641 in words is "two hundred eight million, two hundred eighty-nine thousand, six hundred forty-one".