208865149 has 4 divisors (see below), whose sum is σ = 210072636. Its totient is φ = 207657664.

The previous prime is 208865143. The next prime is 208865201. The reversal of 208865149 is 941568802.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85433049 + 123432100 = 9243^2 + 11110^2 .

It is a cyclic number.

It is not a de Polignac number, because 208865149 - 2³ = 208865141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208865141) 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, 603484 + ... + 603829.

It is an arithmetic number, because the mean of its divisors is an integer number (52518159).

Almost surely, 2^208865149 is an apocalyptic number.

It is an amenable number.

208865149 is a deficient number, since it is larger than the sum of its proper divisors (1207487).

208865149 is a wasteful number, since it uses less digits than its factorization.

208865149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207486.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 208865149 is about 14452.1676228862. The cubic root of 208865149 is about 593.3195518899.

The spelling of 208865149 in words is "two hundred eight million, eight hundred sixty-five thousand, one hundred forty-nine".