208649 has 8 divisors (see below), whose sum is σ = 244608. Its totient is φ = 174240.

The previous prime is 208631. The next prime is 208657. The reversal of 208649 is 946802.

208649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 208649 - 2⁸ = 208393 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (208609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77 + ... + 650.

It is an arithmetic number, because the mean of its divisors is an integer number (30576).

2²⁰⁸⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

208649 is a deficient number, since it is larger than the sum of its proper divisors (35959).

208649 is an equidigital number, since it uses as much as digits as its factorization.

208649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 208649 is about 456.7811292074. The cubic root of 208649 is about 59.3114811027.

The spelling of 208649 in words is "two hundred eight thousand, six hundred forty-nine".