68285513 has 2 divisors, whose sum is σ = 68285514. Its totient is φ = 68285512.

The previous prime is 68285509. The next prime is 68285521. The reversal of 68285513 is 31558286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51079609 + 17205904 = 7147^2 + 4148^2 .

It is a cyclic number.

It is not a de Polignac number, because 68285513 - 2² = 68285509 is a prime.

It is a super-2 number, since 2×68285513² = 9325822571346338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68285533) 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, 34142756 + 34142757.

It is an arithmetic number, because the mean of its divisors is an integer number (34142757).

Almost surely, 2^68285513 is an apocalyptic number.

It is an amenable number.

68285513 is a deficient number, since it is larger than the sum of its proper divisors (1).

68285513 is an equidigital number, since it uses as much as digits as its factorization.

68285513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 38.

The square root of 68285513 is about 8263.5048859428. The cubic root of 68285513 is about 408.7359701781.

The spelling of 68285513 in words is "sixty-eight million, two hundred eighty-five thousand, five hundred thirteen".