208855123 has 2 divisors, whose sum is σ = 208855124. Its totient is φ = 208855122.

The previous prime is 208855109. The next prime is 208855219. The reversal of 208855123 is 321558802.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208855123 is a prime.

It is not a weakly prime, because it can be changed into another prime (208855723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104427561 + 104427562.

It is an arithmetic number, because the mean of its divisors is an integer number (104427562).

Almost surely, 2^208855123 is an apocalyptic number.

208855123 is a deficient number, since it is larger than the sum of its proper divisors (1).

208855123 is an equidigital number, since it uses as much as digits as its factorization.

208855123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 208855123 is about 14451.8207503415. The cubic root of 208855123 is about 593.3100581774.

The spelling of 208855123 in words is "two hundred eight million, eight hundred fifty-five thousand, one hundred twenty-three".