217080847 has 2 divisors, whose sum is σ = 217080848. Its totient is φ = 217080846.

The previous prime is 217080841. The next prime is 217080869. The reversal of 217080847 is 748080712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 217080847 - 2³ = 217080839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217080841) 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, 108540423 + 108540424.

It is an arithmetic number, because the mean of its divisors is an integer number (108540424).

Almost surely, 2^217080847 is an apocalyptic number.

217080847 is a deficient number, since it is larger than the sum of its proper divisors (1).

217080847 is an equidigital number, since it uses as much as digits as its factorization.

217080847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 217080847 is about 14733.6637330978. The cubic root of 217080847 is about 600.9991196025. Note that the first 3 decimals are identical.

The spelling of 217080847 in words is "two hundred seventeen million, eighty thousand, eight hundred forty-seven".