208649013 has 16 divisors (see below), whose sum is σ = 293537280. Its totient is φ = 131464944.

The previous prime is 208648991. The next prime is 208649059. The reversal of 208649013 is 310946802.

It is not a de Polignac number, because 208649013 - 2⁵ = 208648981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208649513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21120 + ... + 29382.

It is an arithmetic number, because the mean of its divisors is an integer number (18346080).

Almost surely, 2^208649013 is an apocalyptic number.

It is an amenable number.

208649013 is a deficient number, since it is larger than the sum of its proper divisors (84888267).

208649013 is a wasteful number, since it uses less digits than its factorization.

208649013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8728.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 208649013 is about 14444.6880547833. The cubic root of 208649013 is about 593.1148233451.

The spelling of 208649013 in words is "two hundred eight million, six hundred forty-nine thousand, thirteen".