68135377 has 2 divisors, whose sum is σ = 68135378. Its totient is φ = 68135376.

The previous prime is 68135359. The next prime is 68135401. The reversal of 68135377 is 77353186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48986001 + 19149376 = 6999^2 + 4376^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68135377 is a prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (68135077) 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, 34067688 + 34067689.

It is an arithmetic number, because the mean of its divisors is an integer number (34067689).

Almost surely, 2^68135377 is an apocalyptic number.

It is an amenable number.

68135377 is a deficient number, since it is larger than the sum of its proper divisors (1).

68135377 is an equidigital number, since it uses as much as digits as its factorization.

68135377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 68135377 is about 8254.4156062074. The cubic root of 68135377 is about 408.4361944763.

The spelling of 68135377 in words is "sixty-eight million, one hundred thirty-five thousand, three hundred seventy-seven".