208399105 has 8 divisors (see below), whose sum is σ = 256178664. Its totient is φ = 162652800.

The previous prime is 208399099. The next prime is 208399111. The reversal of 208399105 is 501993802.

208399105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (208399099) and next prime (208399111).

It can be written as a sum of positive squares in 4 ways, for example, as 11950849 + 196448256 = 3457^2 + 14016^2 .

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

It is not a de Polignac number, because 208399105 - 2³ = 208399097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508086 + ... + 508495.

It is an arithmetic number, because the mean of its divisors is an integer number (32022333).

Almost surely, 2^208399105 is an apocalyptic number.

It is an amenable number.

208399105 is a deficient number, since it is larger than the sum of its proper divisors (47779559).

208399105 is a wasteful number, since it uses less digits than its factorization.

208399105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016627.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 208399105 is about 14436.0349473115. The cubic root of 208399105 is about 592.8779289313.

The spelling of 208399105 in words is "two hundred eight million, three hundred ninety-nine thousand, one hundred five".