208681445 has 12 divisors (see below), whose sum is σ = 291302604. Its totient is φ = 143095680.

The previous prime is 208681441. The next prime is 208681463. The reversal of 208681445 is 544186802.

It is a happy number.

208681445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 91565761 + 117115684 = 9569^2 + 10822^2 .

It is not a de Polignac number, because 208681445 - 2² = 208681441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208681399 and 208681408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208681441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 425636 + ... + 426125.

It is an arithmetic number, because the mean of its divisors is an integer number (24275217).

Almost surely, 2^208681445 is an apocalyptic number.

It is an amenable number.

208681445 is a deficient number, since it is larger than the sum of its proper divisors (82621159).

208681445 is an equidigital number, since it uses as much as digits as its factorization.

208681445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851780 (or 851773 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 208681445 is about 14445.8106383823. The cubic root of 208681445 is about 593.1455526276.

The spelling of 208681445 in words is "two hundred eight million, six hundred eighty-one thousand, four hundred forty-five".