208419920827 has 2 divisors, whose sum is σ = 208419920828. Its totient is φ = 208419920826.

The previous prime is 208419920803. The next prime is 208419920833. The reversal of 208419920827 is 728029914802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208419920827 - 2¹⁵ = 208419888059 is a prime.

It is not a weakly prime, because it can be changed into another prime (208419920887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104209960413 + 104209960414.

It is an arithmetic number, because the mean of its divisors is an integer number (104209960414).

Almost surely, 2^208419920827 is an apocalyptic number.

208419920827 is a deficient number, since it is larger than the sum of its proper divisors (1).

208419920827 is an equidigital number, since it uses as much as digits as its factorization.

208419920827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 208419920827 in words is "two hundred eight billion, four hundred nineteen million, nine hundred twenty thousand, eight hundred twenty-seven".