68042113 has 2 divisors, whose sum is σ = 68042114. Its totient is φ = 68042112.

The previous prime is 68042099. The next prime is 68042123. The reversal of 68042113 is 31124086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66129424 + 1912689 = 8132^2 + 1383^2 .

It is a cyclic number.

It is not a de Polignac number, because 68042113 - 2⁹ = 68041601 is a prime.

It is not a weakly prime, because it can be changed into another prime (68042123) 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, 34021056 + 34021057.

It is an arithmetic number, because the mean of its divisors is an integer number (34021057).

Almost surely, 2^68042113 is an apocalyptic number.

It is an amenable number.

68042113 is a deficient number, since it is larger than the sum of its proper divisors (1).

68042113 is an equidigital number, since it uses as much as digits as its factorization.

68042113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 68042113 is about 8248.7643317045. The cubic root of 68042113 is about 408.2497529707.

Adding to 68042113 its reverse (31124086), we get a palindrome (99166199).

The spelling of 68042113 in words is "sixty-eight million, forty-two thousand, one hundred thirteen".