208859923 has 2 divisors, whose sum is σ = 208859924. Its totient is φ = 208859922.

The previous prime is 208859897. The next prime is 208859929. The reversal of 208859923 is 329958802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208859923 - 2⁵ = 208859891 is a prime.

It is not a weakly prime, because it can be changed into another prime (208859929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104429961 + 104429962.

It is an arithmetic number, because the mean of its divisors is an integer number (104429962).

Almost surely, 2^208859923 is an apocalyptic number.

208859923 is a deficient number, since it is larger than the sum of its proper divisors (1).

208859923 is an equidigital number, since it uses as much as digits as its factorization.

208859923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 208859923 is about 14451.9868184274. The cubic root of 208859923 is about 593.3146033799.

The spelling of 208859923 in words is "two hundred eight million, eight hundred fifty-nine thousand, nine hundred twenty-three".