68912213 has 2 divisors, whose sum is σ = 68912214. Its totient is φ = 68912212.

The previous prime is 68912201. The next prime is 68912231. The reversal of 68912213 is 31221986.

Together with next prime (68912231) 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., 59320804 + 9591409 = 7702^2 + 3097^2 .

It is a cyclic number.

It is not a de Polignac number, because 68912213 - 2⁴ = 68912197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68912213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68915213) 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, 34456106 + 34456107.

It is an arithmetic number, because the mean of its divisors is an integer number (34456107).

Almost surely, 2^68912213 is an apocalyptic number.

It is an amenable number.

68912213 is a deficient number, since it is larger than the sum of its proper divisors (1).

68912213 is an equidigital number, since it uses as much as digits as its factorization.

68912213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 68912213 is about 8301.3380246801. The cubic root of 68912213 is about 409.9825751072.

The spelling of 68912213 in words is "sixty-eight million, nine hundred twelve thousand, two hundred thirteen".