217760713 has 2 divisors, whose sum is σ = 217760714. Its totient is φ = 217760712.

The previous prime is 217760707. The next prime is 217760731. The reversal of 217760713 is 317067712.

Together with next prime (217760731) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163635264 + 54125449 = 12792^2 + 7357^2 .

It is a cyclic number.

It is not a de Polignac number, because 217760713 - 2⁹ = 217760201 is a prime.

It is not a weakly prime, because it can be changed into another prime (217760773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108880356 + 108880357.

It is an arithmetic number, because the mean of its divisors is an integer number (108880357).

Almost surely, 2^217760713 is an apocalyptic number.

It is an amenable number.

217760713 is a deficient number, since it is larger than the sum of its proper divisors (1).

217760713 is an equidigital number, since it uses as much as digits as its factorization.

217760713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12348, while the sum is 34.

The square root of 217760713 is about 14756.7175550662. The cubic root of 217760713 is about 601.6258800254.

The spelling of 217760713 in words is "two hundred seventeen million, seven hundred sixty thousand, seven hundred thirteen".