208398847 has 2 divisors, whose sum is σ = 208398848. Its totient is φ = 208398846.

The previous prime is 208398829. The next prime is 208398863. The reversal of 208398847 is 748893802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208398847 - 2¹⁹ = 207874559 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208398847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208398247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104199423 + 104199424.

It is an arithmetic number, because the mean of its divisors is an integer number (104199424).

Almost surely, 2^208398847 is an apocalyptic number.

208398847 is a deficient number, since it is larger than the sum of its proper divisors (1).

208398847 is an equidigital number, since it uses as much as digits as its factorization.

208398847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 208398847 is about 14436.0260113371. The cubic root of 208398847 is about 592.8776842685.

The spelling of 208398847 in words is "two hundred eight million, three hundred ninety-eight thousand, eight hundred forty-seven".