208139207 has 8 divisors (see below), whose sum is σ = 210587520. Its totient is φ = 205699320.

The previous prime is 208139201. The next prime is 208139233. The reversal of 208139207 is 702931802.

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 208139207 - 2²⁴ = 191361991 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208139201) 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, 57044 + ... + 60582.

It is an arithmetic number, because the mean of its divisors is an integer number (26323440).

Almost surely, 2^208139207 is an apocalyptic number.

208139207 is a deficient number, since it is larger than the sum of its proper divisors (2448313).

208139207 is a wasteful number, since it uses less digits than its factorization.

208139207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 208139207 is about 14427.0304290245. The cubic root of 208139207 is about 592.6313637529.

The spelling of 208139207 in words is "two hundred eight million, one hundred thirty-nine thousand, two hundred seven".