68217911 has 2 divisors, whose sum is σ = 68217912. Its totient is φ = 68217910.

The previous prime is 68217893. The next prime is 68217937. The reversal of 68217911 is 11971286.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68217911 - 2¹⁴ = 68201527 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 (68217971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34108955 + 34108956.

It is an arithmetic number, because the mean of its divisors is an integer number (34108956).

Almost surely, 2^68217911 is an apocalyptic number.

68217911 is a deficient number, since it is larger than the sum of its proper divisors (1).

68217911 is an equidigital number, since it uses as much as digits as its factorization.

68217911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 35.

The square root of 68217911 is about 8259.4134779656. The cubic root of 68217911 is about 408.6010440856.

The spelling of 68217911 in words is "sixty-eight million, two hundred seventeen thousand, nine hundred eleven".