247717 has 2 divisors, whose sum is σ = 247718. Its totient is φ = 247716.

The previous prime is 247711. The next prime is 247729. The reversal of 247717 is 717742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136161 + 111556 = 369^2 + 334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247717 is a prime.

It is a super-2 number, since 2×247717² = 122727424178, which contains 22 as substring.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123858 + 123859.

It is an arithmetic number, because the mean of its divisors is an integer number (123859).

2²⁴⁷⁷¹⁷ is an apocalyptic number.

It is an amenable number.

247717 is a deficient number, since it is larger than the sum of its proper divisors (1).

247717 is an equidigital number, since it uses as much as digits as its factorization.

247717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2744, while the sum is 28.

The square root of 247717 is about 497.7117639759. The cubic root of 247717 is about 62.8037058140.

The spelling of 247717 in words is "two hundred forty-seven thousand, seven hundred seventeen", and thus it is an iban number.