217917057707 has 2 divisors, whose sum is σ = 217917057708. Its totient is φ = 217917057706.

The previous prime is 217917057691. The next prime is 217917057719. The reversal of 217917057707 is 707750719712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217917057707 - 2⁴ = 217917057691 is a prime.

It is not a weakly prime, because it can be changed into another prime (217917057767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108958528853 + 108958528854.

It is an arithmetic number, because the mean of its divisors is an integer number (108958528854).

Almost surely, 2^217917057707 is an apocalyptic number.

217917057707 is a deficient number, since it is larger than the sum of its proper divisors (1).

217917057707 is an equidigital number, since it uses as much as digits as its factorization.

217917057707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512630, while the sum is 53.

The spelling of 217917057707 in words is "two hundred seventeen billion, nine hundred seventeen million, fifty-seven thousand, seven hundred seven".