68284813 has 2 divisors, whose sum is σ = 68284814. Its totient is φ = 68284812.

The previous prime is 68284807. The next prime is 68284831. The reversal of 68284813 is 31848286.

Together with next prime (68284831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52388644 + 15896169 = 7238^2 + 3987^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68284813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68284873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34142406 + 34142407.

It is an arithmetic number, because the mean of its divisors is an integer number (34142407).

Almost surely, 2^68284813 is an apocalyptic number.

It is an amenable number.

68284813 is a deficient number, since it is larger than the sum of its proper divisors (1).

68284813 is an equidigital number, since it uses as much as digits as its factorization.

68284813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 40.

The square root of 68284813 is about 8263.4625309249. The cubic root of 68284813 is about 408.7345735121.

The spelling of 68284813 in words is "sixty-eight million, two hundred eighty-four thousand, eight hundred thirteen".