68243261 has 2 divisors, whose sum is σ = 68243262. Its totient is φ = 68243260.

The previous prime is 68243257. The next prime is 68243297. The reversal of 68243261 is 16234286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54479161 + 13764100 = 7381^2 + 3710^2 .

It is a cyclic number.

It is not a de Polignac number, because 68243261 - 2² = 68243257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68243251) 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, 34121630 + 34121631.

It is an arithmetic number, because the mean of its divisors is an integer number (34121631).

Almost surely, 2^68243261 is an apocalyptic number.

It is an amenable number.

68243261 is a deficient number, since it is larger than the sum of its proper divisors (1).

68243261 is an equidigital number, since it uses as much as digits as its factorization.

68243261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The square root of 68243261 is about 8260.9479480263. The cubic root of 68243261 is about 408.6516503147.

The spelling of 68243261 in words is "sixty-eight million, two hundred forty-three thousand, two hundred sixty-one".