168217513 has 2 divisors, whose sum is σ = 168217514. Its totient is φ = 168217512.

The previous prime is 168217463. The next prime is 168217519. The reversal of 168217513 is 315712861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111260304 + 56957209 = 10548^2 + 7547^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168217513 is a prime.

It is not a weakly prime, because it can be changed into another prime (168217519) 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, 84108756 + 84108757.

It is an arithmetic number, because the mean of its divisors is an integer number (84108757).

Almost surely, 2^168217513 is an apocalyptic number.

It is an amenable number.

168217513 is a deficient number, since it is larger than the sum of its proper divisors (1).

168217513 is an equidigital number, since it uses as much as digits as its factorization.

168217513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 168217513 is about 12969.8694287953. The cubic root of 168217513 is about 552.0228682415.

The spelling of 168217513 in words is "one hundred sixty-eight million, two hundred seventeen thousand, five hundred thirteen".