208649249 has 4 divisors (see below), whose sum is σ = 209638320. Its totient is φ = 207660180.

The previous prime is 208649239. The next prime is 208649267. The reversal of 208649249 is 942946802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208649249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208649239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494219 + ... + 494640.

It is an arithmetic number, because the mean of its divisors is an integer number (52409580).

Almost surely, 2^208649249 is an apocalyptic number.

It is an amenable number.

208649249 is a deficient number, since it is larger than the sum of its proper divisors (989071).

208649249 is an equidigital number, since it uses as much as digits as its factorization.

208649249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989070.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 208649249 is about 14444.6962238740. The cubic root of 208649249 is about 593.1150469663.

The spelling of 208649249 in words is "two hundred eight million, six hundred forty-nine thousand, two hundred forty-nine".