208935958139 has 16 divisors (see below), whose sum is σ = 223430356800. Its totient is φ = 194896458240.

The previous prime is 208935958097. The next prime is 208935958157. The reversal of 208935958139 is 931859539802.

It is a cyclic number.

It is not a de Polignac number, because 208935958139 - 2⁸ = 208935957883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208935958169) 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, 2291087 + ... + 2380535.

It is an arithmetic number, because the mean of its divisors is an integer number (13964397300).

Almost surely, 2^208935958139 is an apocalyptic number.

208935958139 is a deficient number, since it is larger than the sum of its proper divisors (14494398661).

208935958139 is a wasteful number, since it uses less digits than its factorization.

208935958139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91990.

The product of its (nonzero) digits is 20995200, while the sum is 62.

The spelling of 208935958139 in words is "two hundred eight billion, nine hundred thirty-five million, nine hundred fifty-eight thousand, one hundred thirty-nine".