208317047 has 2 divisors, whose sum is σ = 208317048. Its totient is φ = 208317046.

The previous prime is 208316987. The next prime is 208317071. The reversal of 208317047 is 740713802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208317047 - 2⁸ = 208316791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208317077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104158523 + 104158524.

It is an arithmetic number, because the mean of its divisors is an integer number (104158524).

Almost surely, 2^208317047 is an apocalyptic number.

208317047 is a deficient number, since it is larger than the sum of its proper divisors (1).

208317047 is an equidigital number, since it uses as much as digits as its factorization.

208317047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 208317047 is about 14433.1925435782. The cubic root of 208317047 is about 592.8001026791.

The spelling of 208317047 in words is "two hundred eight million, three hundred seventeen thousand, forty-seven".