208300000921 has 2 divisors, whose sum is σ = 208300000922. Its totient is φ = 208300000920.

The previous prime is 208300000913. The next prime is 208300000943. The reversal of 208300000921 is 129000003802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165210544521 + 43089456400 = 406461^2 + 207580^2 .

It is a cyclic number.

It is not a de Polignac number, because 208300000921 - 2³ = 208300000913 is a prime.

It is not a weakly prime, because it can be changed into another prime (208300000981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104150000460 + 104150000461.

It is an arithmetic number, because the mean of its divisors is an integer number (104150000461).

Almost surely, 2^208300000921 is an apocalyptic number.

It is an amenable number.

208300000921 is a deficient number, since it is larger than the sum of its proper divisors (1).

208300000921 is an equidigital number, since it uses as much as digits as its factorization.

208300000921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 208300000921 in words is "two hundred eight billion, three hundred million, nine hundred twenty-one", and thus it is an aban number.