208794997 has 2 divisors, whose sum is σ = 208794998. Its totient is φ = 208794996.

The previous prime is 208794991. The next prime is 208795021. The reversal of 208794997 is 799497802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149597361 + 59197636 = 12231^2 + 7694^2 .

It is a cyclic number.

It is not a de Polignac number, because 208794997 - 2¹⁹ = 208270709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208794991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104397498 + 104397499.

It is an arithmetic number, because the mean of its divisors is an integer number (104397499).

Almost surely, 2^208794997 is an apocalyptic number.

It is an amenable number.

208794997 is a deficient number, since it is larger than the sum of its proper divisors (1).

208794997 is an equidigital number, since it uses as much as digits as its factorization.

208794997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The square root of 208794997 is about 14449.7403782905. The cubic root of 208794997 is about 593.2531179344.

The spelling of 208794997 in words is "two hundred eight million, seven hundred ninety-four thousand, nine hundred ninety-seven".