208264321 has 2 divisors, whose sum is σ = 208264322. Its totient is φ = 208264320.

The previous prime is 208264307. The next prime is 208264337. The reversal of 208264321 is 123462802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204804721 + 3459600 = 14311^2 + 1860^2 .

It is a cyclic number.

It is not a de Polignac number, because 208264321 - 2⁵ = 208264289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208264321.

It is not a weakly prime, because it can be changed into another prime (208264391) 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, 104132160 + 104132161.

It is an arithmetic number, because the mean of its divisors is an integer number (104132161).

Almost surely, 2^208264321 is an apocalyptic number.

It is an amenable number.

208264321 is a deficient number, since it is larger than the sum of its proper divisors (1).

208264321 is an equidigital number, since it uses as much as digits as its factorization.

208264321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 208264321 is about 14431.3658743724. The cubic root of 208264321 is about 592.7500849841.

The spelling of 208264321 in words is "two hundred eight million, two hundred sixty-four thousand, three hundred twenty-one".